Whirlpool · Microwave Moderate
F8E5 — Exhaust Air Temperature Sensor Fault
The control cannot read the exhaust air temperature sensor (or door-position sensor on some firmware variants). Common after a hot, greasy cook cycle that loads up the exhaust path.
- Keep using it?
- Yes, with caution
- DIY difficulty
- Moderate
- Verified against
- producthelp.whirlpool.com ↗
How to fix it
- Power down at the breaker for 1 minute and retest.
- Pull the charcoal and grease filters; degrease the vent path. Run a 5-minute fan-only cycle and recheck.
- Unplug the unit and access the top of the cavity per the tech sheet.
- Reseat the exhaust air temperature sensor connector. If the code remains, replace the sensor.
- If the sensor and wiring check out, inspect door latch hooks and interlock switches for the door-sensor variant of this code.
Why it happens
Typical signs: F8E5 on the display · Microwave aborts mid-cycle · Vent fan runs but heating is interrupted · Door reads closed but unit still throws the code
- Failed exhaust air temperature sensor Most common — sensors fatigue from heat and grease.
- Dirty or blocked exhaust path Heavy grease load skews the reading; clean filters and vents.
- Loose or damaged sensor wiring Check both ends of the harness for backed-out pins.
- Door position sensor disagreement (some models) On firmware where F8E5 covers door sensing, inspect latch hooks and switches.
Parts you may need
If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.
- Whirlpool microwave exhaust air thermistor Common replacementAmazon →
More Whirlpool microwave codes
Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician. Verified against manufacturer documentation: producthelp.whirlpool.com.