Whirlpool Microwave Error Code F7
Inverter / magnetron power fault
On Whirlpool inverter-type microwaves, F7 means the control detected a problem delivering power to the magnetron — the inverter board reported a fault or the expected power draw never materialized. The unit may run but not heat, or abort with the code. A failed inverter board is the documented usual cause, sometimes with a visible burn spot on the board.
What Does Error Code F7 Mean on a Whirlpool Microwave?
Inverter / magnetron power fault.
On Whirlpool inverter-type microwaves, F7 means the control detected a problem delivering power to the magnetron — the inverter board reported a fault or the expected power draw never materialized. The unit may run but not heat, or abort with the code. A failed inverter board is the documented usual cause, sometimes with a visible burn spot on the board.
What Causes Error Code F7?
Here are the most common causes in order of frequency. Start with the most likely cause before moving to the next:
- 1 Inverter board failure 55% of cases
- 2 Magnetron failure 30% of cases
- 3 Harness fault between control and inverter 15% of cases
How to Fix Whirlpool Microwave Error Code F7
- 1
Power-reset
Unplug (or breaker off) for 60 seconds — a transient inverter fault clears with a reboot.
- 2
Test heating
Heat a cup of water for 60 seconds on high. Running-but-not-heating alongside F7 confirms the power path to the magnetron.
- 3
Book service
Inverter and magnetron replacement are internal, high-voltage repairs.
⚠️ Never open a microwave case — the capacitor holds a lethal charge after unplugging.
How to Reset Error Code F7
Unplug the microwave for 60 seconds and retest with a cup of water. If F7 returns or heating is weak, stop using it and have the inverter diagnosed.
Note: If the error returns after resetting, the underlying issue has not been resolved. Work through the fix steps above.
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When to Call a Professional
Magnetron/inverter repairs run $150–$350 with labor — worth it on built-in and OTR models, rarely on countertop units. Whirlpool magnetrons carry longer warranty terms on some models; check yours before paying.
Same Code on Other Brands
Error code F7 appears on these other brands too. See every brand that shows F7 →
Find Replacement Parts
Use these links to find the exact replacement parts for your Whirlpool Microwave:
External links — ApplianceErrors.com is not affiliated with these retailers.
Frequently Asked Questions
What does error code F7 mean on a Whirlpool Microwave? +
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Sources & References
- • Whirlpool Product Help — official manufacturer documentation
- • Our editorial & verification policy
Content verified against manufacturer service documentation. Last verified: June 12, 2026.