Thread: Kenmore microwave power converter cuts in and out

Hi,

Might help...a copy:

Microwave will not operate (cook). F7 error code
appears on the display.

Electrical circuit interruption between L1 and Neutral in
the microwave inverter circuit.

Possible reasons:
1. Check door, hinge and cavity front alignment and adjust
as needed.
2. Check the operation of all interlock switches.
3. Check over temperature protector for the magnatron.
4. Check all Cavity Thermostats for closed circuit.
5. Unplug the oven for at least 40 seconds. If this solves
the problem
A. Check the Cooling Fan for proper operation or
blockage
B. Check the resistance of the magnetron thermostat.
It should be 0 Ohms, replace if necessary.
6. Check that the control cable to the 1100 watt inverter
is properly connected to plug P2 on the display PCB
& Adjust or Reconnect
7. If interlock switches operate correctly, replace 1100W
inverter.
8. If problem persists, replace control assembly.

jeff.

Thanks for the reply!

I can see now that the F7 we get is the direct result of our disconnecting the 1100w inverter (#6 on that list)

So now we know that the F7 code is useless for us.


Any guesses which to replace first, given our odd symptoms? Inverter or Control board....

Checking the inverter may be needed, I have these that may or may not help...

http://appliancehelp.hypermart.net/WLPotr1.pdf
http://appliancehelp.hypermart.net/WLPotr2.pdf

jeff.

Now thats a real tech sheet! I'll look it over tonight and post the results!

Thanks el jefe!