Question about Chamberlain Powerdrive PD422D 1/2 HP Security Plus Screw Drive Garage Door Opener

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Need wiring info for my garage door

Where could I find wiring schematics for the chamberlain formula one garage door opener? My son so kindly pulled them out of the back of the opener.

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Http://www.chamberlain.com/corporate/en-us

Enter your model # and you can download the users and install manuals. hope this helps

Posted on Jun 26, 2009

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Garage door will not close from remote or car. Garage door will open from remote or car; however, it will not close using these controls. The only way I can close the garage door is to press on the manual...


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I Have a Liftmaster Professional Formula 1 garage door opener. When we press button on wall or garage door opener, we hear the motor going but the garage door doesn't do anything. Do I need a new opener?


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There is a rope or string hanging down that releases the dog that hooks the door to the chain...if someone pulled that the door will not open. You need to pull down and back on the srting to relaese the dog and then push the door up to catch the chain...then the door will work again...

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Chamberlain Lift Master Pro Formula 1 only makes click sound


Is the door stuck in the open position? If so the trolley is probably jammed against the bolt just in front of the motor unit. Loosen the chain enough to free the trolley and then run the opener until the door is closed. While the door is closed locate the 'up limit' on the side of the motor unit and turn this control 2 complete turns in the opposite direction of the arrow printed on the cover. Tighten the chain.

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from right to left, 1st pin red wall button 2nd pin white wall button 3rd pin both white photo eye wires 4th pin both black photo eye wires. "if you are trying to rewire the inside of this operator though don't get hurt 150 dollars at sears craftsman is made by liftmaster chamerlain company" ...

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Garage door opens about 8 inches and then revereses


Formula what? they have over forty different types. though sounds something like either limit switches may be faulty. Is this door new? Are there any odd noises from the motor?

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