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My KitchenAid microwave says error code F9. Will not start.

Customer Question
My KitchenAid microwave says...

My KitchenAid microwave says error code F9. Will not start

Contractor's Assistant: Can you guesstimate how old your KitchenAid is? And just to clarify, what's the exact model?

KHMS2050Sss-0. About 8 years

Contractor's Assistant: Do you plan on doing the work yourself?

Yes

Contractor's Assistant: Anything else we should know to help you best?

I’m not sure. There is a light in oven. Just won’t turn on

Submitted: 7 months ago.Category: Appliance
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Answered in 1 minute by:
11/30/2017
Appliance Technician: Tyler Z., Appliance Doc replied 7 months ago
Tyler Z.
Tyler Z., Appliance Doc
Category: Appliance
Satisfied Customers: 88,381
Experience: 9+ years being an appliance technician with factory training.
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Appliance Technician: Tyler Z., Appliance Doc replied 7 months ago

F9 on this microwave means the unit doesn't detect that magnetron is drawing any power. This can be caused by the magnetron being faulty, the inverter board being faulty, or one of the door switches being bad (there are 3). It's really difficult to track down exactly which one is bad, but the best way to go about it is uninstall your microwave and remove the outer shell of the microwave. Push all the door switches by hand to make sure they still click---if not replace the faulty one. If they check good then check the resistance of the magnetron and it should be between 0.1 ohms and 1 ohm and if it checks good, replace the inverter board first. There is no way to test the magnetron to know if it's good 100% for sure because even if it tests good it could still be bad. But if it tests good, then start with the inverter as it's not likely that the magnetron is bad.

I hope I have earned a 5 star rating. We are on the honor system here. Please remember to rate my service by selecting a star at the top or bottom of the screen before you leave today and reply back here letting me know with a rating of 1-5 stars (5 being the best). If you need anything else, just let me know. You can continue asking follow-up questions at no additional charge after rating my service if you still need assistance.

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Appliance Technician: Tyler Z., Appliance Doc replied 7 months ago

Hello again. I'm just following up because I haven't heard back from you and I see this question is still open and unrated. Is there anything else I can help you with?

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