Tower
Overheating / Thermostat Stuck Closed
Oven overheats and burns food even at low temperature settings.
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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-closed oven thermostat contacts, Shorted temperature sensor causing misreading, Welded heating relay on control PCB, Bypassed or failed safety thermostat
How to Fix / Troubleshooting
Safety first: Turn off the oven immediately and isolate from mains power. Do not continue using an overheating oven.
Steps to check:
- Thermostat test: On analogue models, test the thermostat contacts for continuity at the lowest setting. They should open when turned to OFF. If they remain closed, replace the thermostat.
- Sensor reading: On electronic models, test the NTC sensor resistance. A shorted sensor can cause the board to think the oven is cooler than it is.
- Relay inspection: Inspect the control board for a welded or burnt heating relay. If the relay contacts are stuck closed, the board must be replaced.
Warning: Do not bypass thermostats or safety devices; this is a fire and safety hazard.
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Repair Difficulty
Hard
4/5
Required Part
Oven Thermostat
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