6 replies to this topic

[Berniemac]

I have searched the forums for a solution to this problem, but can't find one for this specific model. I am pretty sure it is made by GE, but it may be made by Whirlpool. I tripped the breaker for a minute to turn it off, but the error code came right back after 2 seconds of trying to use it. Tried the grill which works normally, then tried the grill with microwave, which also worked. Then tried the microwave again, which seemed to work, but didn't heat anything. After 2 minutes, the F7 came on again. So, how do I get the panel off to check the circuit board connectors, what else should I check for, or do I need a magnetron?

[RegUS_PatOff]

Kenmore 665.63799305 by Whirlpool, but actually an inverter microwave made by Panasonic
RUN AWAY !

F7 Power to magnetron interrupted
1. Unplug microwave oven or disconnect power.
2. After 40 seconds, check to see whether this solves the problem.
3. Unplug microwave oven or disconnect power.
4. Check cooling fan operation
5. Check resistance of the magnetron thermostat.
6. Check the magnetron.
7. Check P4 and P27 connections.
8. Check wiring to the 1100W inverters and control system. See “Checking Inverters.”
9. Check operation of all interlock switches.
10. Replace all parts and panels before operating.
11. Plug in microwave oven or reconnect power.
12. Check voltage at 4903. If it is 120, unplug microwave oven or disconnect power.
13. Replace inverter.
14. Replace all parts and panels before operating.
15. Plug in microwave oven or reconnect power.
16. If problem persists, unplug microwave oven or disconnect power.
17. Check for reversed plug connection on controls or loose wiring.
18. Replace all parts and panels before operating.
19. Plug in microwave oven or reconnect power.

[Berniemac]

Repair manual, anyone? Or a site with diagrams and pics? And thanks for all the help. This is a great site!

[RegUS_PatOff]

for service manuals and orther perks
Become an Apprentice Appliantologist

[Berniemac]

Ok. Finally got around to taking panel off of Microwave. Disconnected several connectors and cleaned the flat ribbon connectors with eraser. Checked fan operation-working. Put panel back on and tested microwave function and microwave now working, but now I get error code F3H. Turned off power, removed and reinstalled ribbon cable, reinstalled panel, tested microwave again, working and heating, but at end of cycle gives code F3H again. I see where the F3H could be shorted connection or humidity sensor? Any more ideas?, ( I know you do).

[RegUS_PatOff]

have you checked the Humidity Sensor cable and Connector ?

[Berniemac]

Yes, and (insert expletive) me connected it to the wrong slot. After reconnecting it to the correct slot, it is working normally. I understand that I will probably have more of the same problem down the road, but at least for now it is working. Thanks much!