Chamberlain Belt Drive Garage Door Opener Review – Part 3

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Chamberlain Smart Control Panel and Safety Reversing Sensors installation followed by cleaning the garage door tracks. This Chamberlain Belt Drive Garage Door Opener Review is continued from Chamberlain Belt Drive Garage Door Opener Review – Part 2.

The Chamberlain® belt drive garage door opener is fully assembled and I’m ready to wire the door safety sensors, Smart Control Panel and MyQ™ Garage Door Monitor.

Detail of the door arm and trolley assembly:

Chamberlain® Belt Drive Garage Door Opener: Trolley and Door Arm Detail

Another closeup of the belt drive attachment to the trolley and the trolley spring nut. If the belt sags noticeably when the door is raised, tighten the trolley spring nut a full turn to tension the belt, operate the door and tighten the nut a bit more if needed.

Chamberlain® Belt Drive Garage Door Opener: Trolley and Belt Drive Linkages

Chamberlain® Smart Control Panel

The Chamberlain Smart Control Panel was the other reason I purchased the MyQ™ technology belt drive garage door opener – because it’s ultra modern and packed with features:

  • Easy menu driven operation.
  • Illuminated blue LCD display.
  • Displays the time and temperature.
  • Motion detector that turns on the opener lights.
    My wife really likes this feature – never walk into a dark garage again and no fumbling for the light switch.
    The motion detector is excellent and works from the far side of the garage.
  • Displays the backup battery charge status.
  • Automatic Time-To-Close – menu programmable for 1, 5 or 10 minutes and customized up to 99 minutes.
    No worrying if the garage door was left open all day or night.
  • Hold feature – to override the Time-To-Close and keep the door open indefinitely until you decide to close the door.
  • Learn a Device (door remote control or MyQ accessory) directly from the menu.
    No more climbing a ladder to press the Learn button on the motor head.
  • Lock feature to completely disable all garage door remotes.
    Helpful if you’re going away on vacation. For instance, if someone broke into your car while parked in the driveway, the door would not open if the visor remote or HomeLink was pressed.
  • Turns on the opener lights if the door safety sensor beam is broken.
    Nice if the door is left open at night (via the HOLD menu command) and someone walks in the garage. The lights would turn on before a person was close enough to trigger the motion sensor.
  • Displays helpful error messages.
    For example, I received a “Sensor wiring intermittent connection Error Code 14 See User Manual” when blowing leaves obstructed the door safety reversing sensor beam. The computer couldn’t tell if the bad signal were due to a broken wire or blowing leaves breaking the beam, but it pointed me in the right direction and the problem was obvious. Clearing the away the leaves and cycling the door cleared the error message.

Wiring the Smart Control Panel is simple – just strip and connect the two wires to screws on the panel. The panel draws power from the garage door opener and runs on the backup battery power if the house power is out.

The large button at the top of the control panel operates the door, while the bottom button labeled “Light” simply turns ON and OFF the opener lights.

Chamberlain® Garage Door Opener: Smart Control Panel

The Time To Close (TTC) can be set for 1, 5 or 10 minutes to automatically close the door – assuming nothing is blocking the door safety sensors. The TTC can optionally be customized for up to 99 minutes. The TTC is helpful if you forget to press the remote control button to close the door.

Take care that the TTC function is disabled if the garage door opener is operating on backup battery power.

Pressing the HOLD navigation button (forth button to the right) will disable the TTC function. This is helpful if you’re working in the garage or yard and want to keep the door open.

Chamberlain® Garage Door Opener: Smart Control Panel – Time To Close (TTC)

Chamberlain® Smart Control Panel – Programming Remote Controls

Programming Remote Controls and MyQ™ accessories is easy with the Smart Control Panel. Simply navigate the on-screen menus to PROGRAM → REMOTE:

Chamberlain® Garage Door Opener: Smart Control Panel – Programming Remote Controls

Press the key on the remote control you want to program and then press the [Enter] key on the Smart Control Panel. I’ve already programmed the large remote control button to operate the door. In this example, I’ve navigated to PROGRAM → LIGHT TO REMOTE to program the 3rd remote control button to turn ON/OFF the garage door opener lights. Cool!

Chamberlain® Garage Door Opener: Smart Control Panel – Remote Control Programming

I really liked the Smart Control Panel programming because it sure beats the old way of climbing a ladder to press the “Learn” button on the motor head.

Garage Door Safety Reversing Sensors

The Chamberlain garage door opener kit includes two prewired safety reversing sensors with a 25 or 30 foot spool of wire. The sensor bracket securely snaps onto the garage door track. The sensor body attaches to the door bracket with a carriage bolt and wing nut – no tools required. The sensor at the other side of the door (not shown) has a green LED that illuminates when the invisible light beam received. The green LED turns off if the beam is broken or the sensors are misaligned.

Chamberlain Garage Door Safety Reversing Sensor Installation

Chamberlain® Garage Door Opener Wiring and Battery Backup

The Chamberlain Whisper Drive garage door opener accepts 100 watt incandescent or compact fluorescent light bulbs. The control and sensor wiring hookups are easy with the convenient spring tabs to hold the wires in place. Two sets of wires serve the door safety sensors, the other two wires are for the Smart Control Panel.

The opener setup controls are user-friendly with instructions printed on the side of the opener. The battery status LED in the next image display green (fully charged), flashing green (charging), orange (power lost, running on battery) and red (replace battery). The triangular buttons adjust the up/down door travel limits with automatic force adjustment. The “Learn” button is the large yellow button which illuminates the small yellow LED indicating the opener is in Learn mode.

Chamberlain® Belt Drive Garage Door Opener: Control Buttons and Wiring

The included sealed battery slides into the side of the motor housing and attaches with two wiring clips. A battery typically lasts 3 years. Battery lifetime is mainly affected by heat, which causes a battery to age faster, so your mileage may vary.

Chamberlain® Belt Drive Garage Door Opener: Battery Backup

Chamberlain MyQ™ Garage Door Monitor

MyQ™ Technology is a two-way 900 Mhz wireless home automation system developed by Chamberlain to integrate lighting and monitoring controls with your garage door. The Chamberlain Whisper Drive 3/4 HP Belt Drive garage door opener, Model # 349544, is MyQ enabled and includes the table top Garage Door Monitor.

The MyQ™ Garage Door Monitor (Model #AGDMEV) is linked to the garage door opener via the Smart Control Panel menu commands PROGRAM → MyQ™. The door monitor is AC powered and does not have internal battery. I found that it retains the programmed link to the garage door after being unplugged for over an hour, so no need to reprogram after temporary power outages.

The Garage Door Monitor emits a chime when the door opens and closes. Four volumes levels can be selected low, medium high and off – I prefer the low volume setting.

A steady green status LED indicated the door is closed:

Chamberlain MyQ Garage Door Monitor: Door Closed Status Indicator

The monitor beeps three times when the door is opened and the red LED status illuminates:

Chamberlain MyQ Garage Door Monitor: Door Closed Status Indicator

Pressing the “Close Door” button will close the door, assuming nothing is blocking the safety reversing sensors beam. The red and green LEDs will flash and the monitor will emit a long beep when the door is closed.

Chamberlain MyQ Garage Door Monitor: Door Closing

I like the Garage Door Monitor because:

  • It beeps to let me know someone is arriving home.
  • I can see at a glance if the door is open or closed, and remotely close the door if needed.

Clean the Garage Door Tracks

I now have a quiet garage door opener but a squeaky garage door. A well oiled garage door on clean door tracks goes a long way towards reducing noise. The garage door tracks are caked with layers of old grease that has picked up dust/dirt that adds resistance to the door movement.

There’s nothing like carburetor cleaner for cutting through grease. Carburetor cleaner is really hard on your skin, so I donned a pair of nitrile disposal gloves that are resistant to chemicals. To clean the garage door tracks, I sprayed the track with the carburetor cleaner and wiped the grease off with paper towels. I used a whole can of carburetor cleaner, two rolls of towels and four sets of gloves. Take care to open some windows or the door to air out the toxic carburetor cleaner fumes.

Cleaning the Garage Door Tracks: Carburetor Cleaner and Paper Towels

After cleaning the old grease from the door tracks and door hinges, I used garage door spray-on lubricate to oil the tracks and hinges.

The garage door lube dries fast, prevents rust and doesn’t attract dust. This made a huge difference in the door noise.

Garage Door Tracks: Clopay Professional Garage Door Lubricant

Squirrel Damages the Safety Sensor Wires

A squirrel was trapped in the garage overnight and chewed through the safety sensor wires. I repaired the sensor wires with telephone butt splice connectors.

Hope this helps,

Bob Jackson

Copyright © 2018   Reproduction strictly prohibited.


  1. Micah December 10, 2012 at 2:02 pm - Reply

    Bob, thanks for this wonderful write up! After reading your review, I bought the opener and about to go attempt an install. Thanks again for the thorough write up!

  2. Dave August 17, 2013 at 8:08 pm - Reply

    The Chamberlain Belt Drive Opener I just bought does have handy functions. Unfortunately a function it does not have is compatibility with older, door bell style, momentary, push button door actuators. I spent a great deal of money and effort to install a “flash to pass” actuator on my motorcycle some years ago. The transmitter for this unit is located on the bike and when the high beam is flashed, a signal is sent to a receiver mounted in the garage. This receiver acts as a simple relay and is wired to attach to the opener. It worked for a number of years on my old opener but is now useless due to the new electronics on the MyQ system. Very upsetting. Also, I cannot program my wife’s car nor mine to activate the new opener without making numerous phone calls. Nice opener but certain aspects, as noted, are not appreciated. Should have attempted to repair the old opener instead of removing it.

  3. Dat Chu November 10, 2013 at 1:04 am - Reply

    Thank you for the details instructions. Thanks to you, I got the door mounting bracket working :-). Does your opener bend slightly when it is opening? This causes the belt to no longer taut and starts hitting the other parts along the rail.

    • BobJackson November 10, 2013 at 11:27 am - Reply

      My rail does flex slightly up and down when the door open and closes. This is normal. You can see it flex in the Youtube video.

      The rail should not flex so much that it whips about and hits the rail. I initially had excessive sagging as you described and solved it by tightening the belt. See the Chamberlain How do I check and adjust the belt drive tension? instructions.

      If it seems that you’re over tightening the belt and at the limit of the adjustment nut travel, try adjusting the door arm and/or door bracket position for better mechanical leverage. A door arm mounted higher and trolley a bit closer to door will better aid the vertical lifting action of a closed door.

  4. Ralph November 13, 2013 at 11:03 pm - Reply

    I just purchased this device few weeks ago. Today, it shows the battery is half charged and green LED light flickering constantly, to the point where the wall mounted opener lost the time. What should I do. Did I buy a lemon?

  5. Pete June 20, 2014 at 11:53 am - Reply

    Outstanding installation review. Many thanks for the hint on the Coplay Reinforcement bracket. I was unaware it existed, however after installing it , the top section of my garage door is now straight and seals nicely against the frame . The top has a crack in and I was thinking about replacing the door, you saved me $1000 . We will also now attach an angle iron across the door top to strengthen it.

  6. Joey July 9, 2014 at 8:27 am - Reply

    Thanks for this tutorial! The user’s manual didn’t show the correct door control, which caused me confusion then I found your site that helped me quickly and easily complete the programming phase.

  7. R J Crabb July 9, 2014 at 10:16 pm - Reply

    Bought this unit but don’t see what the yellow wires hanging from the bottom of the unit are for. Hopefully someone here can explain that.

    • Bob Jackson July 9, 2014 at 10:31 pm - Reply

      The yellow wire is the antenna. If the wire missing or broken the door transmitter (clicker) range will be severely reduced. I can open my door from 100 feet or more away so it’s open before I pull into driveway. Maybe the wire is pushed inside the motor housing?

  8. Tim August 3, 2014 at 11:37 am - Reply

    I just installed this opener and everything went good. As I started the set up door travel I got the door to its open position and tried to set the down limit and got no movement I checked the safety sensor and they are fine. The wall unit is giving me an error code 15 and the lights are flashing, 1 up and 5 down. This is a LW5000EV could I have damaged the travel module ? a link to error codes would be great in your review as it took some time to find these on Chamberlain’s site. Great job with your review it was very helpful.

    • Bob Jackson August 3, 2014 at 12:49 pm - Reply

      Hi Tim,
      The error codes are listed in the LW5000EV installation manual which also covers the HD920EV, HD930EV, WD962KEV, WD962KPEV, WD962MLEV and 349544 models numbers.

      The best way to find the latest manuals and error codes is to look up your model number on the Chamberlain Parts & Support site.

      > This is a LW5000EV could I have damaged the travel module?
      The three Symptoms and Solutions for Diagnostic Code 15 in the installation manual include “Check wiring connections at travel module and at the logic board. Replace travel module if necessary.” I recommend manually opening and closing the door to verify freedom of movement. Next check the wiring for breaks, pinches, kinks and shorts and verify the connections are correct. Are the safety photo sensors aligned and working? If no joy, call Chamberlain Support line at 1-800-528-5880.


  9. Kristin mcgee September 8, 2014 at 6:12 pm - Reply

    I am getting error codes 11 and 14 and cannot find them in the book nor could I get thru to anyone by phone as I was on hold for 20 minutes. ….how frustrating…..please tell me what these error codes mean. Thanks

    • Bob Jackson September 8, 2014 at 8:25 pm - Reply

      The Chamberlain Smart Control Panel with LCD is showing the numerical diagnostic code that’s being flashed by the UP and DOWN arrows on the garage door opener. The codes are listed in the Troubleshooting section of the installation manual.

      Error Codes 11 and 14 are:

      Error Code 11 (Smart Control Panel LCD)
      Up Arrow Flash: 1
      Down Arrow Flash: 1
      Symptom: The garage door opener will not close and the light bulbs flash.
      Solution: Safety sensors are not installed, connected or wires may be cut. Inspect sensor wires for a disconnected or cut wire.

      Error Code 14 (Smart Control Panel LCD)
      Up Arrow Flash: 1
      Down Arrow Flash: 4
      Symptom: The garage door opener will not close and the light bulbs flash.
      Solution: Safety sensors are misaligned or were momentarily obstructed. Realign both sensors to ensure both LEDs are steady and not flickering. Make sure nothing is hanging or mounted on the door that would interrupt the sensors path while closing.

      The garage door installation manual states:

      “The sending sensor (with an amber LED) transmits an invisible light beam to the receiving sensors (with a green LED).”

      Check the following on your door:
      * If the sending sensor amber LED is not illuminated, then you have a wiring problem. The sensor is not getting power.
      * If the amber LED is glowing, check the sensors are aligned and receiving sensor green LED is glowing. The green LED will not be illuminated if the sensors are misaligned or the beam is obstructed. If you block the beam with your hand, notice the green LED turns off.
      * If the receiving sensor green LED never illuminates, then check for a wiring problem. The receiving sensor is not getting power.


      I had a problem recently with garage door where the receiving sensor clip-on bracket worked it’s way a bit loose after maybe 2 years without a problem. The garage door always opened, but would sometimes reverse itself after closing about two-thirds of the way. The loose sensor bracket was shaking as the door moved causing the beam to become misaligned, which caused the door to think something was in the way. I pressed the bracket on firmly, adjusted the alignment and it’s been fine since.


    • Eugene November 23, 2014 at 1:18 pm - Reply

      I’ve had the same issue with the 11 and 14 error codes for 2 years. I live in Texas. One min. It’s 30 degrees and then 60 degrees the next day. Seems like every time the temperature drops down to 30 degrees Celsius outside this would happen. I believe the cold air is triggering the sensors. I would have to get out of my car and hold down the close button until the garage door closes. Not Cool Chamberlain…Although I still love the remote open and closing feature.

  10. bob September 17, 2014 at 7:06 pm - Reply

    the review was extremely helpful. i honestly can say it made the job much simpler and faster \.Thank you for taking your time and putting it together; it is appreciated. My one negative on the unit, unless i did not understand, is that you cannot perform a lock or unlock from a smartphone(or any other Internet connected device). I would have thought performing a remote lock and remote unlock would have value

  11. Jaime October 19, 2014 at 3:47 pm - Reply

    Just installed and it’s only opening about halfway? I can’t figure out out to adjust the travel settings?

  12. Jim November 30, 2014 at 12:25 am - Reply

    Thanks for this review. I’m wondering if you can help with part of the installation? My model is the HD930EV.

    I’m to the point where I’m trying to install the belt. I’ve hooked the trolley connector into the retaining slot on the trolley, and I’ve wrapped the belt around the sprocket, and used the master link to connect the belt to the trolley threaded shaft. Everything has gone according to plan.

    Here’s where I run into a problem, though. The instructions say to remove the spring trolley nut from the threaded shaft. Done. But then the instructions tell me to insert the trolley threaded shaft through the hole in the trolley. Should I be able to just insert the trolley threaded shaft through the hole? In other words, is the hole supposed to be bigger than the shaft? As best as I can determine, the hole is threaded to accommodate the shaft, and it appears I need to thread the shaft through the hole. Doing that, however, will obviously twist the belt a number of times, which I don’t want to do.

    Am I just not understanding the instructions, or do I need to drill that hole larger, so as to allow the threaded shaft to fit through it?

    • Bob Jackson November 30, 2014 at 6:21 pm - Reply

      Hi Jim,
      The HD930EV threaded shaft appears to be a “half-round” or half-moon profile (like 1/2 of a pie shape) instead of full round profile like the model I installed. Is that correct or is the illustration in the manual wrong? See Figure 3 on page 8 of the installation manual at the previous link.

      The threaded shaft should slide through the hole in the metal flange of the trolley per the HD930EV Installation Manual on page 8:

      “5. Remove the spring trolley nut from the threaded shaft.
      6. Insert the trolley threaded shaft through the hole in the trolley.

      You’ve completed Step 5.

      If the threaded rod is in fact a half-moon profile, then drilling the hole in the trolley flange wouldn’t work because it would be out of alignment. Best to call Chamberlain Customer Support at (800) 528-9131. Maybe the wrong part was in the kit?

    • robert kautz February 15, 2015 at 1:10 am - Reply

      threaded rod didn’t fit… I had that problem.. take off the master link. Turn the threaded rod 1/2 turn. Now it will fit.reattach the master link, and insert the threaded rod.

  13. Babar January 19, 2015 at 7:02 pm - Reply

    Both amber and green sensor are not lighting up, and i am getting the error code 12 and 14
    As per manual i tested the sensory by cutting the wire till 12 inches and also tried with the new sensor but stil no use

    Could it be a logic /mother board problem? Any suggestion?

  14. jen April 20, 2015 at 7:50 pm - Reply

    I have a

    Model # HD930EV chamberlin said the manual that came out is the wrong one with the opener. I need to program the light from 4 minutes to 1 minute. They do not know. said to call back in a week.

  15. Karen June 7, 2015 at 5:06 pm - Reply

    The light stays on when the garage door is there something I need to change

    • Bob Jackson June 8, 2015 at 9:03 pm - Reply

      The garage door light will turn On:
      * when the garage door is operated
      * if the Smart Control Panel infrared (body heat) motion sensor is triggered
      * if the electric eye safety sensor beam is broken

      The light will turn Off after 4 1/2 minutes after the above events.

      The light will also turn On and stay On if the wall mounted door control Light button or remote control Light button is pressed. The lights will immediately turn Off if the light button is pressed or after 4 1/2 minutes if the door is operated.

      Time how long the lights are On to verify if it’s longer than 4 1/2 minutes. Check the safety sensor eyes are clean (no dirt or spider webs, blowing leaves, etc.). Try covering the wall control motion sensor lens with a piece of cardboard in case something is causing false readings. My motion sensor is very reliable and doesn’t get fooled by heat from the hot car engine. You can also change the factory default light On timer from 4 1/2 to as little as 1 1/2 minutes. See pages in the Chamberlain Whisper Drive Owner’s Manual for light configuration options. If you’re still having problems, contact Chamberlain Technical Support.


  16. J August 13, 2015 at 2:08 pm - Reply

    Thanks for this great article. I’m about to purchase the GDO but realized that my door measures 6′ 6″ tall, not the standard 7. There aren’t any obstructions so the full unit should have plenty of space on the ceiling but will this still operate the door correctly and enable it open and close fully? Or do I need to cut the rails and belt (something I’d like to avoid if at all possible).


    • Bob Jackson August 14, 2015 at 7:33 pm - Reply

      It’s not the door height but the height of the ceiling that’s important. The Chamberlain HD930EV installation manual states “Install the garage door opener 7 feet (2.13 m) or more above the floor.”

      If your garage ceiling is a typical 8 feet high or more you’ll mount the opener so the rail is more or less level, adjust the door arm and the door will operate just fine.

      > Or do I need to cut the rails and belt (something I’d like to avoid if at all possible).
      Oh no! Don’t do that.

      The motor setback from the door is determined by the length of the rail. You’ll program the travel limits such that you’re 6.6 ft tall door opens and closes at the correct positions. See “Program the Travel” on page 30 of the installation manual at the above link. Basically, you press the UP and DOWN buttons until the door stops where you need it to be.

  17. John Kra January 8, 2016 at 4:19 pm - Reply

    Bob, I have two Liftmaster 8550W garage door openers. If the door is completely up and I walk through the open door, one of the units displays “Sensor wiring intermittent connection error code 1-4 see user manual” . The other unit does not display this message under the same conditions. When I get this message, I need to recycle the door up and down to clear the error message before I can do anything else such as press the hold button. The installer tells me the message is normal but it seems illogical especially considering only one of the units does this. Your thoughts?


    • Bob Jackson January 11, 2016 at 6:34 pm - Reply

      That error should only occur if the door is closing and something obstructed the safety reversing sensor beam. Error code 1-4 is explained in the LiftMaster 8550W installation manual on page 38:

      “Diagnostic Code 1-4
      Symptom: Sensor wiring intermittent connection error code 1-4 see user manual.
      Solution: Safety sensors are misaligned or were momentarily obstructed. Realign both sensors to ensure both LEDs are steady and not flickering. Make sure nothing is hanging or mounted on the door that would interrupt the sensors path when closing.”

      First verify the sensors are aligned. See page 24 in the manual.

      Check the wiring from the sensors to the garage door opener:
      * Are not damaged and there are no loose connections. Try gently wiggling the wires to identify loose connections. Follow the wires from the sensors along the wall and ceiling to the door opener.
      * The sensor white wires are twisted together and inserted into the white terminal on the opener.
      * The sensor white/black wires are twisted together and inserted into the gray terminal on the opener. See pages 21 – 22 in the manual.

      You could temporarily run jumper splice wire from the error-free garage door opener sensors to the one that’s giving you trouble. Disconnect the sensor wires from both openers and connect two splice wires with wire nuts to the “good” sensors wires to reach the problem door opener. Take care to observe the white & black/white polarity wiring and opener terminal connections. If the error persists with the other set of sensors then you probably have a bad control board.

  18. Michael January 16, 2016 at 8:31 am - Reply

    Thank you for the review. I am installing a Chamberlain opener now and I have a question.
    The manual says that the header bracket should be centered around 2″ above the highest point of the door when opened. You said you set yours to around 4″. My old opener was set closer to 8″ above the door. Is this ok? The placement of the 2×4 is more convenient at 8″.
    Thank you

    • Bob Jackson January 16, 2016 at 10:51 am - Reply

      Placing the header bracket 8 inches above the door should work OK. The opener installation manual and Chamberlain Support FAQ states:

      * 2″ above the highest point of travel for sectional and one-piece door with track.
      * 8″ above the highest point of travel for one-piece door without a track.

      I’m guessing your door has a track so 2 inches is applicable but it appears the bracket height isn’t a critical dimension (within reason) so long as there’s clearance for the door. If you have problems with the door operation the bracket can be lowered.

  19. Terry March 9, 2016 at 12:23 am - Reply

    For whatever reason, the new WD962KEV I just installed only has the black wire in the backup battery compartment. I poked around in the opening at the back of the compartment and see an orange wire and can feel another but not enough slack to see what color that one is. Both appear to be attached at both ends inside the unit. Does anyone know how much of the unit I have to disassemble to see if I can find the other wire for the battery?

    • Bob Jackson March 9, 2016 at 2:37 pm - Reply

      The red and black wires with battery terminal clips should be readily accessible with several inches of slack. See page 32 of the WD962KEV installation manual. So something’s amiss with your unit.

      Contact Chamberlain Technical Support for a resolution.

      • Den Tran June 20, 2016 at 1:58 pm - Reply

        I have a similar issue with the HD950wifi model. I’m missing the BLACK wire for the backup battery instead though. This is rather frustrating after installing the whole system only to find this as an issue with the back up battery.

  20. Paul June 28, 2016 at 11:52 pm - Reply

    I just installed my chamberlain hd950wf belt drive. I’m getting several error codes (1-1, 4-2, 1-5). It seems that the belt drive sprocket isn’t moving and it’s making a section of the belt tight. I recently purchased universal sensors for my old opener and opted to keep those installed instead of the factory chamberlain sensors as well as all of the existing wires. Could the universal sensors be my problem, or is it simply wired wrong?

    • Bob Jackson June 29, 2016 at 7:32 pm - Reply

      According to the Chamberlain HD950WF Owner’s Manual, the diagnostic code 1-1 (1 Up arrow flash, 1 Down arrow flash) solution states:

      “Safety sensors are not installed, connected, or wires may be cut. Inspect sensor wires for a disconnected or cut wire.”

      whereas for codes 4-2 and 1-5 the manual states to “Check for binding or obstructions” by disengaging the door from the opener, then manually opening and closing the door.

      The universal sensors should work but the sensor wire polarity and opener connections must be correct; white sensor wire to the white opener terminal and the colored/striped sensor wires to the grey terminal on the opener. Still the Chamberlain Owner’s Manual wants you to use the sensors included with the kit per page 24, Step 14 – Option B Pre-Wired Installation.

      The single-strand thin-gauge garage door wiring can also break easily if kinked or twisted too tightly under a wire nut.

      It’s easy enough to test the Chamberlain safety sensors included with the opener:
      1 – Disconnect the universal sensor wires from the opener terminals.
      2 – On the step ladder, temporarily wire the sensors to the opener with a 3 feet or so lengths of wire.
      3 – Align the two sensors on top of the ladder so the Green LED on the receiver sensor is illuminated.
      4 – Press the door button to close and open the door.

      If the door operates without problems then you know it’s either the universal sensors are wired incorrectly or there’s a break/bad connection in the wiring. If the door still won’t operate and you’re seeing diagnostic codes 4-2 and 1-5 then the door is sticking or binding, but that usually only happens when the door is closing as it travels through the 90 bend in the tracks.

      BTW – instead of wire nuts I used butt splice connectors to hook-up the Chamberlain sensors to the door wiring. I used butt splice connectors to repair the wire after squirrel was caught in the garage overnight and chewed through the wires.


  21. mark December 11, 2017 at 8:50 am - Reply

    Hi I just installed the bigger model but same instructions. I used the 8ft door extension kit too.All works well but when the door opens the belt goes a little slack. I am worried that it might catch on the mechanism??

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