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Error code · Microwave

Whirlpool Built-In Microwave, Code F1 E5: Inverter and Magnetron

F1 E5 on a Whirlpool built-in microwave or microwave drawer, such as model WMC50522AS, indicates a problem that may be in the microwave inverter or the magnetron tube, or in the wiring tied to them. These…

Medium · inspection needed
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Code
F1 E5
Appliance
Microwave
Brand
Whirlpool
Warranty
30-day workmanship

What F1 E5 means

F1 E5 on a Whirlpool built-in microwave or microwave drawer, such as model WMC50522AS, indicates a problem that may be in the microwave inverter or the magnetron tube, or in the wiring tied to them. These are the parts that generate microwave energy. The display shows F1 E5 and the oven may run without heating food, or may stop at the start of a cycle. Because these parts carry high voltage, we do not ask owners to look inside.

Common causes of F1 E5

  • Microwave inverter
  • Magnetron tube
  • Wiring to the inverter and magnetron
✓ One safe check you can try

1. Turn off the circuit breaker for the microwave and wait one minute. 2. Turn it on again. 3. Monitor the oven for a minute to confirm F1 E5 does not return. 4. Run a short test with a cup of water to see whether it heats. 5. If F1 E5 comes back or the water stays cool, stop using the oven.

! Why to stop there
  • A reset cannot show whether the inverter or the magnetron is the weak part, so we test both after making the oven safe.
  • The cost of the magnetron and inverter matters on older units, so we compare repair and replacement.
  • You approve a written price before we start.
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.
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Other Microwave codes

F8E5Whirlpool Microwave Code F8E5: Exhaust Air Temperature Sensor PUSH or PSHWhirlpool Built-in Microwave Shows PUSH or PSH: Press Start F9Whirlpool OTR Microwave Error F9: Control and Relay Boards Registration ErrorWhirlpool Over-the-range Microwave "Registration Error": Network Checks F9 or F9E0Whirlpool Built-in Microwave Codes F9 and F9E0: Home Power Supply Sabbath, Sab, 5Ab, or 5A6Whirlpool Built-in Microwave Showing Sab or 5Ab: Sabbath Mode F9QWhirlpool Over-the-range Microwave with F9Q on the Display: Power Reset Code SEWhirlpool Over-the-range Microwave Error SE: Keypad Circuit
F1 E5F1 E5 questions
What do the inverter and magnetron do?

The inverter supplies controlled power to the magnetron, and the magnetron produces the microwave energy that heats food. F1 E5 says one or both, or their wiring, may have a problem.

Can I open the microwave to look?

No. These parts hold dangerous voltage even when the oven is unplugged. Leave the casing closed and let us test it. Leave the casing closed and let us test it safely.

Will you tell me if it is not worth fixing?

Yes. Inverter and magnetron repairs can be a larger cost on an older microwave, and we give you an honest view before you decide. That keeps the decision simple.

Book a visit

Still seeing F1 E5?

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

(713) 589-6107