Whirlpool WMH31017HS Repair Guide
Whirlpool’s volume over the range microwave, with a 300 CFM vent and electronic touch controls. Its faults follow the standard OTR pattern almost exactly. Interlocks and fuses first, the vent side second, and high voltage components toward the end of its life.
Whirlpool WMH31017HS is an over the range microwave, 1.7 cu ft microwave sold 2017 to present. Its most common repair is no power at all, usually $110 to $260.
- 5 common problems with causes, fixes and costs below.
- 3 error codes decoded.
- A microwave like this lasts about 7 to 10 years.
- Check the model and serial tag before you order any part.
Common problems & typical repair costs
| Problem | Likely cause | Typical fix | OEM part # | Typical cost |
|---|---|---|---|---|
| No power at all | Line fuse blown by a failed door interlock | Replace interlock switch set and ceramic fuse | not listed | $110 to $260 |
| Turntable stopped rotating | Roller ring worn, coupler stripped, or turntable motor failed | Replace ring or coupler (owner doable). Motor is a cabinet job | not listed | $10 to $200 |
| Heats weakly or not at all | Magnetron or diode failure | Professional high voltage repair | not listed | $150 to $400 |
| Exhaust fan running constantly | Thermal protection responding to heat from the cooktop, or a stuck thermostat | Verify normal thermal behavior before replacing anything | not listed | $0 to $280 |
| Door will not latch | Broken plastic latch hooks | Replace door latch assembly | not listed | $100 to $240 |
Costs are national averages for professional repair (parts + labor). See the linked cost guides below for full breakdowns.
Error codes
| Code | What it means |
|---|---|
| F2 | Touch panel shorted key |
| F6 | Sensor circuit fault |
| Open/Close Door | Interlock or latch fault, the unit cannot confirm the door is shut |
Tech notes
A fan that runs on its own after cooking is designed behavior on this platform, not a fault, the microwave protects itself from cooktop heat and keeps running until it cools. Explain that before anyone pays for a thermostat.
Sources
Where the safety, regulatory and warranty claims on this page come from. Repair costs are our own figures based on Arizona market rates and OEM parts pricing.
- Microwave Ovens, Radiation Emitting Products U.S. Food & Drug Administration The federal requirement for two independent door interlocks plus a monitoring system, and the 21 CFR 1030.10 leakage limit, why an interlock must never be bypassed.
Cost guides for this machine’s common repairs
DIY step by step instructions for this model
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