Gaggenau Heating system failure (electric heater or heat pump)

Dryer display and controls work, but there is no heat; clothes come out cold.

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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

Failed heater element, Tripped thermal fuse, Faulty heater relay on control board, Failed heat pump compressor (on heat pump models)

How to Fix / Troubleshooting

Safety first: Unplug the dryer and allow it to cool before accessing the heater area.

  • Confirm no heat: Run a high heat program for 10 minutes and check if the air inside is warm. If not, proceed.
  • Access heater or heat pump: Remove the rear or side panel to reach the heater assembly or heat pump module.
  • Test thermal fuse and thermostats: Use a multimeter to check continuity. Replace any open safety devices and investigate the cause of overheating.
  • Check heater element: Measure resistance of the heater. Replace if open or shorted.
  • Heat pump models: If the compressor does not start and E-codes are absent, check the compressor and inverter board connections. Heat pump diagnosis beyond basic checks should be done by a professional.
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Repair Difficulty

Hard 4/5

Required Part

Heater Element
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