"electroninja" writes:

Ref your questions Sam:
Q. Does it do the same thing if set to defrost..
A. Yes, will run longer in the cycle but eventually shutsdown
Q. Can it be restarted immediately?
A. Yes, I can hit the start button and the cycle replicates as many
times as I restart-ie runs 40 seconds and shutsdown
Q. How is the behavior different than if the STOP button was pressed
A. No difference
Q. Isn't the fan simply on the AC line so how would its speed change?
A. Looks like an AC fan--speeds up only on first cycle--otherwise runs
at top speed. Blade turns freely--no obstructions--low ohms on the
coil--can sub another fan from a different brand if appropiate--your
thoughts

Not sure what you're saying here about the fan. If it runs at top (normal)
speed, it's not the problem.

The fact that you can restart immediately and get the same exact behavior
suggests that it may not be a cooling problem but also check across the
thermal protector if possible, or is there a thermistor to monitor
magnetron temp? Could be a problem in that area. Is there a schematic
with it?

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