E12
Mora
Heat Pump / Heater Relay Error
Dishwasher displays E12 and may have issues with drying or heating phases.
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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 or burnt heater relay on control board, Faulty heat pump assembly (on heat-pump models), Loose heater wiring, Overcurrent in heater circuit
How to Fix / Troubleshooting
Safety first: Unplug the dishwasher. Do not work on the control board while it is connected to mains.
- Confirm heating issue: Run a hot program and check if water heats and dishes dry. If not, suspect heater or control.
- Inspect heater wiring: Access the bottom and side panels to inspect the heater or heat pump wiring for burns or loose connectors.
- Check for relay damage: Remove the control board housing from the door. Look for darkened or burnt areas near the heater relay.
- Component replacement: If the heater tests good but E12 persists, the control board (with heater relay) may need replacement. This is typically a job for a qualified technician.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control Board
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