The problem may be in the rotary encoder or the flat cable connection between the keypad and the main controller board. Some GE microwave models have had problems with this connector. The repair takes some time, but probably no new parts.
1. Unplug the oven and set it on a table so you can get at the right side easily. Remove the top/side cover.
2. Study the control board behind the keypad to see how the cable from the keypad is connected. (See anti-static precaution below.) I have not worked on this particular model, but usually the cable goes into a friction-fit connector on the component (rear-facing) side of the control board. Sometimes the connector has a latch or clamp mechanism, probably a collar that goes around the rim of the connector. If the collar is present, pull it up a couple of millimeters to release the cable.
3. Using a clean, soft, white pencil eraser (not the hard red kind usually found on wood pencils, but the kind used in most mechanical pencils), gently rub the contacts on the end of the cable until they are free of visible oxidation. Blow away any eraser debris. Insert the cable into the connector, making sure it is properly lined up so the corners don't go dog-eared on you. If there is a latch, re-engage it, making sure both ends go into place simultaneously.
Test the oven before re-assembly. Caution: there are hazardous voltages present inside. Remove all tools before testing, and do not touch anything in the oven when it is plugged in.
Anti-static note: the electronics on the controller board can easily be damaged by static electricity from your hands. Avoid touching components. If it is necessary to dismount the controller to get at the cable, only handle the board by the edges, and touch a hand to the metal frame of the oven first to discharge static buildup. Do not touch the circuit patterns on the keypad side of the board.
Sounds like the keypad is bad and I believe this is one part (keypanel and smart board) ...
1,387 views
Usually answered in minutes!
×