Viking Microwave F2 Error: Humidity sensor fault
What Viking Microwave F2 Code Means F2 points to the humidity sensor — the component that allows your Viking microwave to automatically adjust cooking time based on the steam emitted by food. When it fails, sensor-cook, auto-reheat, and auto-defrost programs no longer work reliably. The good news: manual cooking (set power level and time yourself) […]
Quick Assessment
Answer to continue safely
Is it safe to keep using?
Yes. F2 only affects sensor-cook programs. Manual time and power cooking works normally. The microwave is safe to use in manual mode while awaiting sensor repair.
Can I reset the code?
Yes. Cleaning the sensor and power cycling may resolve F2 if caused by contamination. A failed sensor requires professional replacement.
When to stop immediately?
Stop if you notice: No need to stop use — manual cooking is unaffected, If F2 is accompanied by any other fault code, investigate the additional code.
Symptoms You May Notice
Auto-cook programs give poor results
Sensor cooking modes over- or under-cook food. Manual time/power cooking still works normally.
Sensor cook programs fail or produce poor results
Auto-cook, auto-defrost, and sensor reheat produce under- or over-cooked results.
Manual cooking works normally
Setting power level and time manually works without issue.
Possible Causes
Condensation or food splatter on sensor
Moisture or grease deposits on the humidity sensor window cause erratic readings.
DIY PossibleHumidity sensor failure
The sensor component has failed electrically and must be replaced.
Requires ProfessionalControl board issue
The circuit processing the sensor signal has developed a fault.
Requires ProfessionalSafe Checks You Can Do
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1
Clean the sensor area
The humidity sensor is usually a small rectangular window or vent on the interior ceiling or side wall of the microwave cavity. With the unit unplugged, gently wipe the sensor area and surrounding interior surfaces with a damp cloth. Remove any food splatter or grease deposits.
Do not use abrasive cleaners or steel wool on the sensor window. A damp cloth with mild dish soap is sufficient.
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2
Power cycle the microwave
After cleaning, unplug the microwave for 60 seconds, then restore power. Attempt a sensor cook program on a cup of water to test.
If F2 clears and sensor programs work correctly, the fault was sensor contamination.
When to Call a Professional
Contact a qualified technician if:
- F2 returns after cleaning and power cycle
- Sensor tests open or short circuit
- Control board signal processing circuit is faulty
Need Professional Help?
Find qualified technicians in your area for proper diagnostics and repair.
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