Building Materials - Recent Questions, Troubleshooting & Support

I suspect they STACK, If yes, they go in the SAME direction. Another way of looking at is the front (+) of one sits against the back(-) of the other.If they are not stacked, the case should be marked or they are close enough to have a single mark.

Building... | Answered 17 hours ago

I am assuming this model is like almost all chain drive models. My last one was chain, my current is belt, but the adjustment is very very similar.

The part that slides along the top rail and attaches to the actual door is also attached to the drive chain. That attachment is almost always were the tension adjustment is. It should be a bolt with a spring around it as I have drawn the box around below. Yours may not be identical, but should be quite similar. Tighten it to add tension to the belt.
CAUTION: Over-tightening will put excess stress on the bearings which will cause them to eventually fail. The chain can sag slightly and not cause any problems, just tighten it enough to keep it clear of riding on the bar (or other issue like slipping).

2019-03-19 15.58.09-uzacjlv0f5uzeepj3of3gtlv-5-2.jpg

Building... | Answered 19 hours ago

What kind of spring? The big spring(s) that help lift the door or an internal part?

Additional Info:
The part is cheap and not too hard to install: It just screws on the end of the chain where it meets the slide assembly.

Building... | Answered 19 hours ago

If you're having to hold that inside button down to bring it down that is because of your sensors being out of alignment. On the bottom left and bottom right of your garage door track are your photo eyes and if they're not cleaned and pointing toward each other, then they will not allow the door to close. It will only close with the inside button because it is hardwired and when you hold the button down it shoots a continuous current that bypasses Those sensors. Remotes and keypad are wireless and must have photo sensors aligned to work

Building... | Answered 20 hours ago

I would consult a locksmith for proper advice.

Building... | Answered Yesterday

Check to see if you have anything blocking the sensors. Then try pressing the door opener to open and close the garage door. See if that resets it and stops the issue.

Building... | Answered 2 days ago

Most garage openers have a reprogram button on the lift motor. You push the button on the motor and enter in the new code on the keypad but you only have a really short time to set it so get someone to push the button from a safety ladder and you can set the code. You hit program and then push your code numbers.

Building... | Answered on Mar 12, 2019

They are made by Chamberlain, give them a call.

Building... | Answered on Mar 10, 2019

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Sir . winner rolex ad Dayton1992 78488 how much indian price

Building... | Answered on Mar 10, 2019

If you use LED lightbulbs close to the operator, they can block your remote signal.

Building... | Answered on Mar 10, 2019

Check your home circuit breakers.

Sears Craftsman... | Answered on Mar 08, 2019

Try this link:

Building... | Answered on Mar 08, 2019

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