Whirlpool · Microwave Moderate

F5 — Shorted Humidity Sensor

The humidity sensor circuit has been shorted for more than 5 seconds. Older OTR fault chart; on newer models the equivalent is F4E4 or F5E0/E1.

Keep using it?
Yes, with caution
DIY difficulty
Moderate
Checked against
applianceaid.com ↗ community repair site, not a manufacturer document

How to fix it

  1. Power-cycle at the breaker for 1 minute.
  2. Unplug the microwave and disconnect the humidity sensor; the F5 should clear with the sensor disconnected.
  3. Check the sensor wiring along its full length for melted insulation or pinches.
  4. Install a new humidity sensor and retest a sensor-cook cycle.
  5. Replace the electronic control only if a new sensor and harness don't clear the code.

Why it happens

Typical signs: F5 on the display · Sensor cook modes fail · Microwave still cooks manually

  • Internally shorted humidity sensor Heat and grease eventually short the element.
  • Pinched or melted sensor wire A wire pinched at install can short to the cabinet.
  • Failed control board Less common; verify the sensor and wiring first.

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 humidity sensor Common replacement
    Amazon →

More Whirlpool microwave codes

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All Whirlpool codes → All microwave codes →

Frequently asked questions

What does the F5 code mean on a Whirlpool microwave?

The humidity sensor circuit has been shorted for more than 5 seconds. Older OTR fault chart; on newer models the equivalent is F4E4 or F5E0/E1.

What causes the F5 code on a Whirlpool microwave?

Internally shorted humidity sensor: Heat and grease eventually short the element. Pinched or melted sensor wire: A wire pinched at install can short to the cabinet. Failed control board: Less common; verify the sensor and wiring first.

Is it safe to keep using a Whirlpool microwave with a F5 error?

Yes, with caution. This is rated a moderate-severity fault.

How do I fix F5 on a Whirlpool microwave?

Power-cycle at the breaker for 1 minute. Unplug the microwave and disconnect the humidity sensor; the F5 should clear with the sensor disconnected. Check the sensor wiring along its full length for melted insulation or pinches.

Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician. How we verify: applianceaid.com — community repair site, not a manufacturer document.