F4E0
KitchenAid
Upper Oven Temperature Too High or Over-Temperature Condition
F4E0 error, oven may not heat or may shut down during preheat
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Stuck relay on control board, failed high-limit thermostat, cooling fan not running, blocked oven vents
How to Fix / Troubleshooting
Safety: Turn off power and allow the oven to cool completely before inspection.
- Check for blocked vents: Ensure nothing is obstructing the oven's top or rear vents inside the cavity or on the cabinet.
- Verify cooling fan operation: During a bake cycle, the internal cooling fan should run. If it does not, test the fan motor and its wiring.
- Inspect high-limit thermostat: Locate the thermal cutoff/high-limit thermostat on the oven chassis. Test for continuity; an open thermostat will prevent proper temperature control.
If the oven overheats due to a stuck relay, the control board must be replaced. Replace any failed high-limit thermostat or cooling fan motor as needed.
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Repair Difficulty
Hard
4/5
Required Part
High-Limit Thermostat
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