F8
Thermador Oven Cooling Fan Error

Oven displays F8, often related to cooling fan operation or during self-clean.

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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 cooling fan motor, Obstructed fan blades, Faulty fan relay on control board, Broken wiring to fan

How to Fix / Troubleshooting

Safety first: Disconnect power at the breaker. Internal metal parts may be sharp; wear cut-resistant gloves.

  • Listen for fan: During bake or self-clean, you should hear the cooling fan running. If not, suspect the fan or its circuit.
  • Access fan: Remove the rear panel of the range to access the cooling fan assembly.
  • Inspect fan: Check for obstructions, such as insulation or wiring, contacting the blades. Spin the fan by hand to ensure it moves freely.
  • Check wiring: Verify the fan connector is secure and wires are intact.
  • Test voltage (advanced): With power on and a bake cycle running, carefully measure voltage at the fan connector. If proper voltage is present but the fan does not run, the fan motor is defective.

Replace the cooling fan assembly if it fails to run with proper voltage. If no voltage is supplied when the fan should be on, the control board or fan relay is likely faulty.

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Repair Difficulty

Hard 4/5

Required Part

Oven Cooling Fan Motor
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