H2
Haier Overheating / Temperature Control Fault

Dishwasher displays H2; water may become excessively hot or there may be steam escaping from the door.

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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

Shorted NTC sensor reading low resistance, Stuck heater relay on main board, Failed thermostat or thermal cut-out, Wiring short in heater circuit

How to Fix / Troubleshooting

Safety first: Immediately stop the dishwasher, disconnect power, and allow it to cool. Overheating is a fire and scalding hazard.

  • 1. Inspect NTC sensor: After cooling, access the NTC and measure resistance. A very low resistance at room temperature suggests a shorted sensor.
  • 2. Check thermal safety devices: Locate any thermostats or thermal fuses in the heater circuit. If they have opened, determine the cause of overheating before replacing.
  • 3. Examine control board: Inspect the heater relay on the main PCB for signs of welding or burning that could cause it to stick closed.
  • 4. Wiring inspection: Check for damaged insulation or shorts in the heater wiring harness.
  • 5. Replace faulty components: Replace the NTC sensor, heater relay (via new control board), or thermal devices as required. Test carefully after repair.

Warning: Do not operate the dishwasher until the overheating cause is fully resolved.

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Repair Difficulty

Professional Required 5/5

Required Part

NTC Temperature Sensor
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