Challenger 9300 Model CH-1000
My remote works perfectly, all the time. But, the button on the wall inside the garage only works when it's not hot in the garage. I removed the button, tested it with a continuity tester and it closed the circuit. I even tried touching the wires together, but the opener didn't work. Totally stumped, I put it back in the wall, and at 7AM the next day, pushed the button and it worked!
Sounds like a problem with the wiring. A break in a wire can show these symptoms. The broken ends can make contact at certain temperatures and not others.
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