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A different microwave problem

Discussion in 'Electronic Repair' started by Charlie Bress, Nov 25, 2007.

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  1. This is a fairly old Panasonic microwave.
    It does all the usual things that it is asked to do.
    It heats.
    The timer times.
    The turntable rotates.

    It seems to have developed a mind of its own.

    Occasionally, after it is through heating and shuts off it does something
    strange.

    When the door is opened, the interior light comes on again and the turntable
    starts turning.
    During this time it is not trying to heat. The off button does not affect
    this action. Close the door and the light goes out and the turntable stops.
    After a bit it reverts back to normal and stays truly off as expected.

    Is this phenomenon governed by the control electronics, which would probably
    call for a replacement microwave or is it caused be the failure or
    misadjustment of one or more of the mechanical switches that could be
    remedied by a DIYer?

    Charlie
     
  2. James Sweet

    James Sweet Guest


    I would check all the door switches, relays, look for cracked solder joints
    or bad electrolytic capacitors on the control board. It's probably something
    you can fix.
     
  3. nucleus

    nucleus Guest

    before this problem, did the light normally stay off when door was
    opened?
    (my old GE microwave oven always turns the light "on" when the door
    is opened)
     
  4. nucleus

    nucleus Guest

    forgot to mention in previous post, have you taken the cover off
    and looked inside for a schematic? (there was one inside my
    old GE mw oven)

    if you find one, look at what controls the turntable.
     
  5. I may be a flakey door interlock switch.

    I have one that does something similar, though I've never gotten around
    to actually figuring out what's going on.

    --- sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/
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  6. I had no idea, Sam! ;-)


    --
    Service to my country? Been there, Done that, and I've got my DD214 to
    prove it.
    Member of DAV #85.

    Michael A. Terrell
    Central Florida
     
  7. hr(bob)

    hr(bob) Guest

    Picky, Picky. Instead of picking directly on Sam, you should correct
    his spelling of flakey. <G>

    Bob Hofmann
     

  8. Gee, I thought he spelled it that way for the Europeans. ;-)


    --
    Service to my country? Been there, Done that, and I've got my DD214 to
    prove it.
    Member of DAV #85.

    Michael A. Terrell
    Central Florida
     
  9. Guest

    No door switches should affect the turntable. The problem must be
    flakey control electronics.
     
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