Question about Panasonic NN-T945SF Stainless Steel 2.2 Cu. Ft. Countertop Microwave Oven

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What would cause the fan and turntable on a Panasonic Inverter microwave to run continuously when plugged in with the door closed (and not turned on)?

I just replaced the door latch because it was broken, but now when I plug it in the fan comes on and the turn table rotates inside with the door closed. When I enter time and start the microwave the light comes on and seems to be working fine. If I push the stop button, the fan and turn table continue to run. When I open the door the fan and turn table stops and the light comes on. If I closed the door the fan and turn table come back on. I have check the door switches and all three have continuity and seem to be engaged and disengaging properly when the door is closed and open. Any ideas what could be my problem?

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  • Brad
    Brad Aug 09, 2015

    I have check all three switches for continuity. The primary and secondary switches have continuity when activated/closed. The short switches has continuity when it's not activated/open and no continuity when activated/closed as it should. I have checked all of the switches when the door is open and closed and they are all functioning as they should, at least as far as I can tell. I read somewhere that is could be a relay switch problem on the circuit board. Could this be it?

    When I plug the microwave in with the door open, the turntable starts to turn, but then it stops after less than a second when I hear a little click from the circuit board (I think from the relay switch).

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The door switch is adjustable. one or more need adjusting to solve the problem

Posted on Aug 08, 2015

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