SOURCE: F4 error code on Jenn-Air W30400BC expressions built in oven
Slone, F4 is the code for a shorted temperature sensor. This is the temp probe in the oven. There are 2-quarter inch screws holding it on. It should pull out through the insulation until the quick connect comes through. If you want to make sure, the sensor should ohm out at 1143 ohms at 100 degrees. I think you can be pretty sure that this is the problem. The part number I have is 704657. Catriver.
SOURCE: Oven will not heat up on bake broil or convection cook.
I justn encountered the same problem (Model KERS507Y). Haven't checked yet...but am suspecting the Thermal fuse. Have you solved the problem?
SOURCE: Oven won't work
unplug wait 5 minutes and plug back up press the off button and this should allow the oven to reset and should come on
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