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If the microwave runs for a few seconds and stops the touchpad might be at fault. This is not common. Generally speaking, if the microwave display is working and some of the buttons respond correctly but some don't, the problem is with the touchpad
The touchpad is bad most likely. You can go to www.appliancejunk.com and they will have the part. The part will come with detailed instructions for installation.
That sounds like the interface controller which is just a little computer chip that cotrols everything and watches the signals from the touchpad is having problems. Usually these will behave like this and then just stop so your touchpad is totally dead. It may take out the time displays as well.
If you have warrenty from GE or the store it will be covered. If you are not covered then it can cost about the same or more as a new microwave as they will have to replace the board. Check your warrenty's, then check the repair cost and check replacement costs. Usually a new microwave is the cheapest.
I am not familiar with the Whirlpool microwaves; however, I just had the same problem with an LG over the range microwave. Several of the positions on the touchpad quit responding to touch. In our case, it was the touchpad itself that was the problem.
The touchpad on our microwave was held in place with adhesive. We pulled it off and replaced it with a new touchpad. Everything works now. The only complication is getting to the connector which carries the signals from the touchpad to the microwave controls. We had to remove and dissassemble the door to get to that connector.
We have an LG LMVM2075SB over the stove microwave that we purchased in December, 2007. A few weeks ago, several of the positions on the touchpad stopped working.
I assumed that the problem involved the touchpad itself. I ordered a new one (Part number MFM37134802 - $25.30 plus shipping), and we installed it today. This solved the problem.
J. Adams,Alabama
The installation was not simple. The door has to be removed and disassembled to enable you to get to the connector that connects the touchpad with a circuit board. We heated the old touchpad with a hair dryer and pulled it off (after disconnecting the connector). The new touchpad comes with an adhesive backing. You have to be very careful in placing it because the adhesive is very strong. The touchpad fits in an identation, so the placement of the new one must be perfect.
Failure of the touchpads on these LG models seems to be a common problem. It sounds like a design problem.
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