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Kelly, Home Appliance Technician
Category: Appliance
Satisfied Customers: 24878
Experience:  Technician with over 30 years of experience.
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My MC35J808 oven displays the message C-FO but is otherwise

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My MC35J808 oven displays the message C-FO but is otherwise dead. What does the message mean?

Hi, welcome to Just Answer. Sorry to hear you are having appliance trouble, I know how frustrating that can be! My name is ***** ***** I look forward to helping you!

That error means that there is a Communication Failure in between the various electronic controls in the appliance. It is a bad error to get because so many things can cause it, including wiring and connection issues, a faulty controller, etc. However, it may also be caused by just a glitch that may be easily reset. Unplug the appliance for 5 full minutes to reset the electronics. Does the behavior change when plugged back in?

Customer: replied 7 months ago.
No effect.

So from here it is a bit of a guessing game. Check all connections and wiring looms between all of the electronics and then replace the main board to start with if all appears to be okay. With this error, it is impossible to diagnose with any degree of certainty which part has failed if the wiring is good. I would strongly encourage you have it professionally repaired unless you have some electrical/electronic background/knowledge.

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