Before I start randomly fiddling with wires thought I'd ask the collective for insight. Installed a Chamberlain opener today, using existing wiring. Like an idiot, I yanked the old one out without taking note of the wires and where they were hooked up. Standard install, with two reverse sensors at floor level and a control on wall. Replaced all those with items from new opener.

So the issue is the wall control (that has a light, temp, clock, etc.) loses power at the same time the light goes off on opener a couple minutes after operating. Wall control won't open or close door when it has power or after it doesn't. Remotes work fine.

Obviously wall control gets power since it restarts and resets clock each time I open door with remotes. So it's connected, I just think I may have it connected to the slots for reverse sensors. IOW, it only powers up when you use a remote to open/close door.

Weird thing is, the reverse sensors work as set up - close door, stick your foot in there and it goes back up.

There are only three sets of wires run to opener, all inside sheetrock so can't trace. One from each side for sensors and one for wall control. Yeah, they all look exactly the same too. Opener has one pair of connections for both sensors, one pair for wall control. With what I've described do I just have one of the sensors plugged into control connection and the wall control in the sensors?

Note to self - don't be an idiot next time.

These things are pretty goof proof. I would double check your connections at the remote and the opener. There's a red striped wire and a white wire. Red stripe goes to screw on controller marked R and to red terminal on opener. Then connect the other wire to the white terminal. No red stripe due to existing wiring won't matter, just make sure the same wire coming from the red terminal hits the R screw. If that's wired correctly, it seems like you may have a bad controller. That everything else is workings well, I think the opener itself is GTG.

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just make sure the same wire coming from the red terminal hits the R screw.

Only way to do this is to rip out sheetrock. All wires are encased and come out of walls at base of door, opener and wall mount. And all three sets have same color casing, and a red/white combo.

Disconnect wire at sensor and control.
Also disconnect at opener
Select one pair and twist together at one end , then take multimeter amd test for shorts on all sets.
Once you discover which , reconnect at sensor or control , and attach other end to appropriate place on opener.
Do the same for next pair.

Now you have traced all wires.

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Originally posted by Georgeair:

quote:

just make sure the same wire coming from the red terminal hits the R screw.

Only way to do this is to rip out sheetrock. All wires are encased and come out of walls at base of door, opener and wall mount. And all three sets have same color casing, and a red/white combo.

If you have an ohm meter and some extra wire, you can determine which wire is the one because the wrong wire will show an open circuit. Look in the instructions for troubleshooting and an 800 number for installation/tech support. Also possible that the switch is defective.

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Originally posted by BigWhup:
https://www.youtube.com/watch?v=rk5y2uWmlWw

Makes sense - thanks. I was just confused that the sensors were working properly even tho hooked up wrong apparently.

Where’s that ladder.....