Question about liftmaster Chamberlain Garage Door Opener Transmitter 300MC

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Wayne dalton idrive will not open more than 1 foot. When it closes it doesnt have the motor drop down either. Its only 2 years old and has always worked ok.

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There is a white plastic gear that moves a slide switch on the main circuit board. Spray the slide switch with some terminal/connection cleaner. This did the trick for me. The door stops moving because it doesn't sense movement.

Posted on Feb 01, 2015

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Mine too did you get it fixed ?

Posted on Feb 13, 2011

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What you are experiencing is a need to recalibrate the door, but the underlying cause is that a linear potentiometer becomes non-linear, and the calibration drifts. Once this starts happening, it will continue to be a problem until you buy a new potentiometer, or clean the one you have. If you are handy, it isn't too hard to do.

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I have an old Wayne Dalton Doormaster Garage Door opener. It is definitely quirky, but when it stopped working this last week I called the Garage Door Guy to come and take a look at it. When he slid off...


Hi njitrrr,

Geez, that's a tough one! Other than getting a thick piece of Lexan and carving one out yourself....

There is a company, Ridout Plastics, that make some really tough plastic epoxies. I've used them and they are tough. As for gears, hmmm. I found their website and saw that they will fabricate a plastic part for individuals. Rare for a factory.

Here is the website that talks about fabricating parts: http://www.eplastics.com/Plastic/Plexiglass_Shape_Charges

Also, here's their site with the plastic adhesives: http://www.eplastics.com/Plastic/Adhesives?gclid=CJuT4pDOtKgCFUMUKgodNFTsDA

WeldOn #40 sounds likely. It might be worth a try to contact them about making a gear for you. Beats the alternative!

Hope this helps. If it does, I'd appreciate a 4 thumbs up. Thanks,

Handie Andie

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