E12
Hoover
Overheating / Thermostat Control Fault
Dishwasher displays E12; water appears excessively hot, with steam escaping when the door is opened.
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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 heater relay on PCB, Faulty NTC sensor reading low, Shorted wiring causing continuous heating
How to Fix / Troubleshooting
Safety first: Unplug the dishwasher and allow it to cool completely. Overheating can cause burns.
- Check NTC sensor: Test the NTC as described for E11. A sensor that reads too low resistance at room temperature can cause overheating.
- Inspect control board: Remove the inner door panel and inspect the main PCB. Look for a stuck or burnt heater relay (discoloration, melted plastic).
- Check wiring: Ensure there are no shorts between heater wiring and live supply that could bypass control.
- Replace faulty components: Replace a defective NTC sensor first. If overheating persists, the main control board with heater relay will likely need replacement.
- Do not use until fixed: Overheating can damage the tub and pose a fire risk. Do not continue using the dishwasher until the fault is resolved.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control Board (PCB)
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