DIY Home Improvement, Remodeling & Repair Forum > DIY Home Improvement > Windows and Doors > Garage door does not open (trolley stuck?)




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Old 06-22-2013, 09:42 AM  
alu2007
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Default Garage door does not open (trolley stuck?)

Hi all,
My garage door started misbehaving and finally stopped opening. The other day I closed the garage door but it opened up right away after closing. After a couple of attempts it stopped opening altogether.
When I press the opener on the wall the chain just shakes /rattles and gives up.

I have detached the door from the trolley and am manually lifting up the door to get the cars out. The gear and sprocket looks fine. But I changed it out just to be sure but same behavior

If I disconnect the chain the motor rotates fine.

But if I connect the chain back (door still disengaged) all it does is the chain tightens up very hard but the trolley does not budge.

The trolley is on garage door end (not on the opener end). I disconnected the chain and pressed the wall switch to make sure the gear rotated clockwise so that it would be as if garage door was closed. With the garage door still disengaged, I connected the chain back and pressed the button on the wall to see if the trolley would reverse. Motor just hums and chain tightens up but trolley does not move towards garage opener side.

I am not sure what is preventing the trolley from moving. I would assume the trolley would move from door end to opener end easily with the garage door disengaged

Any idea what I should check for ? Should I increase the limits or the force?



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Old 06-23-2013, 06:04 AM  
WindowsonWashington
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Have you opened the cover on the machine yet?

Most have a plastic gear inside of them that fails and is easily serviceable.



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Old 06-23-2013, 09:25 AM  
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Originally Posted by WindowsonWashington View Post
Have you opened the cover on the machine yet?

Most have a plastic gear inside of them that fails and is easily serviceable.
Thanks. I changed the gear and sprocket if that is what you mean. It did not fix the problem though.
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Old 06-23-2013, 12:56 PM  
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Can you check the voltage at the motor and see if it is within range?

Any chance the opening/closing force setting got bumped out of whack?

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Old 06-23-2013, 03:09 PM  
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Can you check the voltage at the motor and see if it is within range?

Any chance the opening/closing force setting got bumped out of whack?

I have been trying it this afternoon. With chain disconnected the motor moves. With chain connected (garage door is disengaged), the motor just hums and the chain on one side tightens up.

I did not change the opening /closing force.

How do I check voltage at the motor and what is the expected range.
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Old 06-30-2013, 07:59 AM  
alu2007
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Hi all,
Restating the problem..

Problem:
Trolley is on door side. Not against stop bolt on the opener side. Garage door no longer opens

What I have tried so far:

  • Replaced gear and sprocket. It did not make a difference
  • Removed chain from gear. Disconnected garage door. Motor turns fine clockwise and anticlockwise with chain removed
  • Connect chain. Garage still door disconnected. Press wall switch to open. Chain tightens on one side but trolley does not reverse. The other side of the chain is loose. But one side is really tight
  • With chain tight on one side, try one more time. Just a small buzz and GDO blinks 5 times and does that over and over. No movement
  • I have not changed the limits or the force.



From what I have read, it appears that the problem can be any of the following
- Limits or Force out of adjustment
- Starting capacitor
- RPM sensor
- Bad logic board or a cold solder on the logic board
- Gear and Sprocket

Can anyone guide me on the next step to troubleshoot. I already bought the gear and sprocket but it did not fix the problem. I want to avoid buying the capacitor, RPM sensor or logic board.

Thanks
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Old 06-30-2013, 02:54 PM  
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I am sorry, but you are beyond my garage door knowledge so far.

I posted a link to this thread to see if I could get FirehawkMike to post on this as he knows his stuff very well.

If you want to PM me your email, I can have him email you as well.

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Old 07-01-2013, 06:49 AM  
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Originally Posted by WindowsonWashington View Post
I am sorry, but you are beyond my garage door knowledge so far.

I posted a link to this thread to see if I could get FirehawkMike to post on this as he knows his stuff very well.

If you want to PM me your email, I can have him email you as well.

Hi WindowsonWashington,
I sent you a PM with my email address in case FirehawkMike can provide any insight. Thanks again for your help
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Old 07-01-2013, 07:03 AM  
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I pm'ed him on the other board and I did get your message.

He hasn't been on the other board much of late as I am sure he is busy with work.

Hopefully he pops in and sees about making some recommendations. He is really good with the garage door, amongst other, stuff.

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Old 07-01-2013, 07:34 PM  
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Alu,
what kind of opener is it, and can you post some pics? Your binding up problem sounds pretty strange. I'm just wondering with having the chain off, sprocket and gear changes, etc., things got out of sync as to where the chain is and where the opener thinks it is. When you disconnect the chain from the sprocket on the motorhead, does the trolley move freely on the rail, and also, if you take the chain all the way off, does the sprocket or pulley at the door end of the rail turn freely? How old is the opener?
Mike Hawkins



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