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Error code · Microwave

F3 on Your Whirlpool Built-In Microwave: Oven Control

On a Whirlpool built-in microwave or drawer unit like the WMC50522AS, a plain F3 with no letter or second character points at the oven control or the wiring attached to it. The display shows the code…

Medium · inspection needed
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Code
F3
Appliance
Microwave
Brand
Whirlpool
Warranty
30-day workmanship

What F3 means

On a Whirlpool built-in microwave or drawer unit like the WMC50522AS, a plain F3 with no letter or second character points at the oven control or the wiring attached to it. The display shows the code instead of a normal readout. Over-the-range models use F3 followed by a letter for individual sensors, such as F3C or F3T1, and those are separate codes with their own meanings. The guidance for plain F3 gives a power reset and no named failed part.

Common causes of F3

  • Oven control board
  • Wiring and connectors serving the control
  • Connections that carry power and signals to the control
✓ One safe check you can try

1. Shut off the breaker that serves the microwave. 2. Let sixty seconds pass. 3. Switch it on and look at the display. 4. Give it another minute. 5. A clean display and a normal brief cycle mean you are done. 6. A returning F3 means the microwave should stay off until we check the control.

! Why to stop there
  • A reset restarts the control but cannot show whether the control or its wiring is the cause, so a repeat needs testing.
  • We start with the connections to the control and then the control itself, and tell you which it is.
  • Where the microwave has years behind it, we tell you straight if repair is not the smart choice.
Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.
→Same appliance

Other Microwave codes

FC E8Whirlpool OTR Microwave Registration Code FC E8: Entry Mistake FCE8Whirlpool Over-the-range Microwave Registration, FCE8: Wrong Model Selected Feature Not Available or Fault DetectedWhirlpool Built-in Microwave Message "Feature Not Available": Retry or Cut Power LOCWhirlpool Microwave LOC on the Display: Control Lock Is On PFWhirlpool Over-the-range Microwave Showing PF: Power Failure Indicator Press Cancel to ResetWhirlpool Built-in Microwave Message "Press Cancel to Reset": Error Cleared by Cancel F8 E4Whirlpool Microwave Drawer Error Code F8 E4: Exhaust Air Temperature Sensor Probe or Insert ProbeWhirlpool Built-in Microwave Asking for "Insert Probe": Seat the Meat Probe
F3F3 questions
What does a plain F3 mean on a built-in microwave?

It points to the oven control or the wiring around it. Nothing more specific is given for the plain code, so a technician has to test the control circuit to find the cause.

My over-the-range microwave shows F3C or F3T1. Is that the same?

No. On over-the-range models, F3 followed by a letter names a particular sensor. Those pages have their own explanations, and the plain F3 on this page is for built-in units and drawers.

Do I need to call right away?

Try the one-minute breaker reset first. If F3 stays away and the oven runs normally, you can continue. Should F3 come back, leave the oven unused and book a check.

Book a visit

Still seeing F3?

A technician diagnoses it on site and gives you the price in writing before any work starts.

(713) 589-6107