motion switch on garage opener

tonyb73December 17, 2009

I have 2 doors in my garage and are liftmaster 3850 with motion switch on them. ever since the elctric company put in new digital meter the opener light stays on when the motion switch is on. liftmaster sent me new logic board that didnt help then sent new wall switch smae problem. if motion switch is off and I use the door opener the light goes off after 3 minutes like it should. this is strange anybody have a answer. both door openers have they same problem

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I would talk to the electric company and explain what is happening after they installed the new meter. Although the manufacturer of the opener calls that wall control a "motion sensor" in the owners manual it says it detects body heat. I think it must be detecting heat from the digit meter that was installed. Sorry I don't have an answer for you but this is something new.

    Bookmark   December 17, 2009 at 4:56PM
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I will bet a dollar to a donut that the digital meter is generating radio frequency (RF) interference, which is affecting the opener's circuit board. The fault may lie with meter, the opener (overly sensitive to RF), or both.

I would start by telling the electric company and asking them to change out the meter. If it is generating electrical interference, it probably violates FCC regs. Sometimes a gentle mention of that fact can cause an electric utility to actually do something about their RF polluting equipment.

Good luck.

    Bookmark   December 17, 2009 at 10:23PM
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I have been doing some snooping and I find the digital meter transmits data eliminating the meter reader. Good thing they put an off switch on that motion sensor.

    Bookmark   December 21, 2009 at 1:09PM
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I called COMed and waiting to hear from them

    Bookmark   December 25, 2009 at 11:26AM
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Comed came out today put in old meters. motion light works. they are trying to find out how to fix the problem with the new meters they are leaving in the old ones. Can RF signal be sheilded

    Bookmark   January 22, 2010 at 1:26PM
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