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Whirlpool Microwave F3H Error Code

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Maya Ortiz Written by Maya Ortiz Appliance Repair Content Specialist Published October 20, 2026

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Code overview at a glance.

The facts for this Whirlpool error, a plain-language snapshot, and what to confirm against your model number.

Error code F3H
Appliance Microwave
Quick answer

What F3H means on a Whirlpool over-the-range microwave and how to try a power reset.

Model note: Whirlpool reuses codes across series and model years, so F3H may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.

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What this code may mean.

A plain-language reading of the code — always confirm against your model’s documentation.

There may be a problem with the Humidity Thermistor or the associated wiring.

Getting F3H on the control panel suggests the Humidity Thermistor or the associated wiring could be the source. That applies to over-the-range microwave models.

What to do first

  1. Unplug the microwave, or turn off its breaker, and wait one (1) minute.
  2. Reconnect the plug, or turn the breaker back on, so the microwave has power.
  3. Give it one (1) minute while you monitor the microwave for a repeat of the error.
  4. Verify microwave operation.

Repeat appearances of F3H are a signal to ask a qualified technician for help.

Easily confused codes

  • F3H1 deals with the humidity sensor; easy to mix up with this one.
  • F3C is worth comparing, since it concerns the cavity temperature thermistor.
  • F3T2 relates to the convection thermistor as well.

Microwave repair help in Los Angeles

Call (310) 448-6692 for Whirlpool microwave repair in Los Angeles. Tell us the error code, the model number and any steps already taken, and read more about microwave repair on the site.

Source: Whirlpool Product Help: F3H – Error Code – Over-the-Range Microwave

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Safety warning before you continue.

Stop immediately if you notice smoke, sparks, a burning smell, gas odor, or water near electrical parts.

Important

Do not attempt repairs involving electrical components, gas, water lines, refrigerant or sealed systems. Unplug the appliance if it is safe to reach the outlet, and leave internal diagnostics to a qualified technician.

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Seeing this code on your appliance?

Book an Whirlpool appliance service visit for a clear estimate and approval before any repair.

Experienced technicians, clear diagnostics, and workmanship coverage on completed repairs.

Book a Repair (310) 448-6692

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Ready to restore your Whirlpool appliance?

Book a repair online or call us — clear estimates, approval before any work, and a workmanship warranty on completed repairs.

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Tell us what’s wrong — we’ll take it from there.

Share a few details and we’ll confirm an appointment. Prefer to talk? Call us and we’ll help right away.

Prefer to call? (310) 448-6692
  1. Share the symptom Tell us the Whirlpool model and what’s going wrong.
  2. Confirm a window We’ll schedule a visit that fits your day.
  3. Approve before work You get a clear estimate — nothing starts without your OK.
Phone (310) 448-6692
Email info@whirlpoollosangeles.support
Hours Mon–Sat: 8:00 AM – 7:00 PM
Service area Serving Los Angeles County and Orange County.
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