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F6

Whirlpool Microwave

Severity: Moderate

Source: OnlyErrorCodes.com — Every error code. One place.

Whirlpool Microwave F6 Error — Sensor Fix

What Does This Error Mean?

F6 on a Whirlpool microwave means the humidity (or temperature) sensor used by sensor-cook features has detected a fault. Manual cooking still works — sensor cooking does not. The sensor needs cleaning or replacement.

Affected Models

  • Whirlpool WMH31017HS
  • Whirlpool WMC30516HZ
  • Whirlpool WMH53521HV
  • Whirlpool WMH73521CS
  • Whirlpool WMH76719CS

Common Causes

  • Grease and food residue coating the sensor probe
  • Sensor wiring loose or disconnected after vibration
  • Failed sensor component (common after 5–7 years)
  • Control board fault affecting sensor reading (less common)

How to Fix It

  1. Confirm manual cooking still works.

    Try heating water for 30 seconds at full power using the time-cook function. If manual cooking works, F6 is limited to sensor functions and the microwave is still usable.

  2. Clean the sensor area inside the microwave.

    The humidity sensor is typically a small grille on the back wall or upper rear corner of the cavity. Wipe it gently with a barely damp cloth to remove any grease or food splash. Severe build-up can be addressed with a 50/50 vinegar-water solution on the cloth.

  3. Run a steam-clean cycle if available.

    Many Whirlpool microwaves have a steam-clean function. Place a microwave-safe bowl of water inside, run the cycle, and let the steam loosen residue around the sensor. Wipe down afterwards.

  4. Book a service call if F6 persists.

    If F6 continues after thorough cleaning, the sensor or its wiring is faulty and needs replacement. Sensor parts cost roughly USD 30–60 plus labour.

Frequently Asked Questions

Can I still use my Whirlpool microwave with F6 showing?

Yes — F6 only affects sensor cooking (Auto Cook, Reheat, Popcorn auto-modes). Time-based manual cooking continues to work normally. The error display may persist until the sensor issue is resolved.

Is F6 usually the sensor or the control board?

F6 is the sensor or its wiring in roughly 90% of cases. Control board faults that mimic F6 are rare and usually accompany other symptoms (display flickering, unrelated function failures).