Question about Chamberlain Powerdrive PD422D 1/2 HP Security Plus Screw Drive Garage Door Opener
Door will only go down if i hold the button
This is what we call in the buisness a constant hold down , that means that the sensors are not aligned , be careful when checking theese sensors because even the slightest flicker will send a false signal to the opener and not allow it to come down , I have installed over 27 thousand ..yes thousand machines to date and i,ve seen it all also make shure the sensor lenses are free of dirt or cobwebs , so now you need to check theese things and also if you realign the sensor and you only have to do one ! make shure you have a steady solid light, is their is a short in the wire ,you should splice a new wire in its place black to black and white to white as they are color coded universaly, also check for brooms and shovels and the typical junk that people usually put in the corners of the garage ,i,ve had many service calls and just had to move a broom that was in the way of the sensor , the beam must be unobstructed and the lights should be bright and solid without any flicker , also green light is the sending unit and the yellow light means it,s the recieving unit on your sensors , Hope you have luck and i was able to help you ,thanks so much for the questionSincerely glenn
Posted on Mar 04, 2009
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Posted on Jan 02, 2017
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