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Chamberlain Powerdrive PD422D 1/2 HP Security Plus Screw Drive Garage Door Opener - Page 2 Questions & Answers
My garage door starts going
take some toilet paper, or some very light rag and dust the RPM sensor over, under, inbetween and in every spot on that darn thing, and bingo, it will work. Its the plastic ribed piece mounted on the end of the motor under opener cover. If something gets under door as door starts to go down, the RPM`s will slow and thats a warning to stop and go back up. With it being dusty, it can`t sense the RPM`s properly and goes into an alarm every single time. Ugg
Red LED light remains on and beep sound
My battery is bad. I knew it, but did not feel like it was worth any of my attention. The beeping started yesterday and this was worth my attention. Everyone in the family complained. I suspected it was the battery.
I unplugged the unit. Disconnected the battery. Waited for 30 seconds. Plugged it back in. It works fine and no beeping.
I suspect it is a warning to replace the battery.
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