Thermador Oven Error E118

⚡ Quick Answer: The Thermador oven E118 error indicates a malfunction in the upper oven cooling fan, which may cause erratic temperature readings or the oven to stop ... ⚠️ Difficulty Varies

What Does Error E118 Mean?

The Thermador oven E118 error indicates a malfunction in the upper oven cooling fan, which may cause erratic temperature readings or the oven to stop operation. Symptoms include the error appearing at startup or during use, beeping sounds, and potential cooling fan issues. Temporary clearing of the error can occur after a power cycle, but persistent issues may signal a need for inspection of the cooling fan, wiring, or control board.

Common Symptoms:

  • E118 appears on the oven display when powering on or during use
  • Oven may stop operation and beep
  • Cooling fan not operating at expected speed or not detected by the control system
  • Temporary clearing of the code after power cycling (breaker reset)

Possible Causes

  • Upper oven cooling fan failure or supervision fault (medium)
  • Loose/damaged wiring or connector related to the cooling fan or its sensor (medium)
  • Control board communication or sensor feedback fault (low)

How to Fix Error E118

DIY Fix Basic checks and reset

  1. Turn off the oven and disconnect power at the breaker or unplug it.
  2. Wait at least 5 minutes for the electronics to reset.
  3. Restore power and observe if the E118 error returns.
  4. If comfortable, ensure the oven ventilation isn’t blocked and that the fan area is free of debris.

Technician Only Inspect and repair cooling fan and electrical connections

  1. Disconnect power to the oven.
  2. Remove access panels to locate the upper oven cooling fan and its wiring harness.
  3. Inspect the fan motor, fan blades, and hall effect / tachometer sensor for proper operation and secure connection.
  4. Check all related wire harnesses for damage, pinching, or burnt connectors.
  5. Test the cooling fan motor and hall sensor with appropriate tools (multimeter) to verify functionality.
  6. Replace the cooling fan motor or hall sensor if found defective.
  7. Verify and tighten all electrical connections and reassemble.

Parts needed: Upper oven cooling fan assembly, Hall effect / tachometer sensor, Associated wiring harnesses

🛑 When to Call a Pro:
  • If you are not experienced with high‑voltage appliance diagnostics or internal oven components
  • If the error persists after inspecting and securing wiring and basic reset attempts
  • If the cooling fan or sensor tests indicate failure and replacement is required

Technical Specifications

wattage
component Temperature Sensor
resistance 1000-1200 ohms
part_number Thermador 00420013
voltage_rating 120V AC

Common Questions

What does E118 error mean on Thermador oven?

E118 signifies a malfunction in the upper oven cooling fan, causing erratic temperature readings.

Can I fix Thermador oven E118 error myself?

Yes, perform a basic reset by turning off power for 5 minutes and checking connections.

How much does it cost to fix E118 error?

Repair costs range from $150 to $300+ depending on parts and labor.

When should I call a technician for E118?

Call a technician if the error persists after basic checks or if you're unsure about handling high-voltage components.

Data last verified: 2026-03-25

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