KitchenAid KMLS311HSS Repair Guide
A low profile over the range microwave designed to fit the space of a range hood rather than a standard microwave. The shallow cavity is the trade off for a much less intrusive look above the cooktop.
KitchenAid KMLS311HSS is an over the range microwave, low profile, 1.1 cu ft microwave sold 2018 to present. Its most common repair is no heat, usually $185 to $430.
- 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 heat | Magnetron or diode failure | Professional high voltage repair | not listed | $185 to $430 |
| Dead unit | Interlock failure and blown fuse | Replace interlock set and fuse | not listed | $120 to $280 |
| Weak extraction | Filters loaded, or ducting restricted by the shallow cabinet | Clean filters. Verify duct routing | not listed | $0 to $230 |
| Control panel faults | Touch membrane after years of cooktop steam | Replace panel | not listed | $185 to $420 |
| Turntable free cavity not heating evenly | Normal for a low profile design without a turntable | Advise stirring or repositioning mid cycle | not listed | $0 |
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 | Shorted keypad |
| F6 | Sensor fault |
| Open/Close Door | Door not sensed as closed |
Tech notes
Low profile units trade cavity height for a cleaner sightline, and some have no turntable at all. Uneven heating complaints on these are often the design rather than a fault worth chasing.
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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