Question about Chamberlain 1/2-HP Whisper Drive Belt Drive Garage Access System

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Hi there. I have a Chamberlain Whisper Drive

Hi there. I have a Chamberlain Whisper Drive garage door opener. Currently, when I try to open the garage door, the door opener motor runs, lifts the door about four inches & then drops it down again. I heard a loud crack the first time I tried to open it but can't see any obvious physical damage. The wheels are not obstructed and the belt still seems to be engaged. Any suggestions?

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I just had that problem this morning and the cause was that the springs that help hold the weight of the garage door were broken. This caused the garage door opener to raise the garage door a fe inches and then drop again. We called in a professional and $200 later we had new springs and everything works fine now.

Posted on Dec 17, 2009

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Posted on Jan 02, 2017

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The motor runs but it only opens a few inches and slowly goes back down its a chamberlain whisper drive model HD900D


Hi. I have seen this before, although usually not from chamberlain garage door openers.

Pull the release cord that unlocks the door from the opener, and manually open the door ALL the way open.

Then lock back in place in the open position.

Then use automatic opener to shut door.

It will close very slowly, but should close all the way.

Then, open the door again using the remote, and the door will once again open slowly, this time it should open all the way.

Then close door with remote, and door should now close as it is supposed, with the proper speed.

The slow opening and shutting is the system position sensor resetting itself.

This is why your door is acting up.

I would also look up by the belt drive connects to the front of the garage door opening, to make sure there isn't any dirt, cobwebs, or other obstructions on the sensor that may cause it to re-close the way it does.

Jan 24, 2011 | Chamberlain 1/2-HP Whisper Drive Belt...

1 Answer

Chamberlain Power Drive / Whisper Drive My garage door starts to open and immediately reverses but continues to run. I had to release the cord to allow the chain to run its course before it would stop....


It sounds like the door is your problem.
Check the counter balance spring above the door. It is likely broken.
If the door cannot be operated manually, the garage door opener will not open it either. The machine is made to operate a door that works correctly. If the door is broken, the machine will not work either.
It also sounds like the opener gears may be worn out. That also occurs because the door required service.

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I have a chamberlain whisper drive garage door opener. When I open the door and it reaches the top it starts making a loud noise. It's like the motor is still trying to pull the door up but it can't...


SOUNDS LIKE THE UP LIMIT IS EITHER OUT OF ADJUSTMENT OR NOT WORKING.

TURN IT ABOUT THREE TURNS COUNTER CLOCKWISE. THIS SHOULD BE ENOUGH TO MAKE IT NOT OPEN ALL THE WAY. THEN ADJUST IT 1/2 TURN AT A TIME THE OTHER WAY UNTIL IT GETS CLOSE THEN SMALLER ADJUSTMENTS TILL YOU ARE HAPPY WITH WHERE IT STOPS.

HOPE THIS HELPS

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If the wall button will operate the door up but none of the devices do then look at the wall button. Find the lock button and push it for 2 seconds and then try the remotes again. This is your vacation lock. You can get a manual at chamberlain.com. Now if the door does not open or close with the remotes you can reprogram them. Press the colored learn button on the motor head and then press the button on the remote. Repeat for each remote. If they fail to program you will need a new logic board. Thanks BB

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Adjustment of a Chamberlain WD822KL


The opener is having a hard time operating the door. It sounds like the door is out of balance. The door should stay all the way up at half down and all the way down. You should be able to raise and lower the door by hand EASILY. The opener is only meant to lift10-15 lbs. Thanks BB

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It sounds like you may have a spring problem. Release the door from the opener and see how it acts manually. Open it as far as the opener does and then see what happens when you release it. Also the weight of the door should give you a clue.

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