"Charlie Bress" wrote in message
. ..
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



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.