Hi, David. I'm Smitty. I am a professional appliance repair consultant here to help you diagnose, and repair, your appliance.
These units are known to have the antennas come loose from their solder points on the main board. If the local switch is not wired directly that is definately the problem.
If it is hard wired then check where the wires go into the board for any loose connections. Tighten as needed and that should take care of it.
If the remotes still will not open the door then use a strong magnifying glass and check the solder point that the antenna is atached to. Resolder it to the board if needed.
If that isnt the problem then the receiver cars is toast and will simply have to be replaced.
Please let me know if you need anything else right now.
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