Common microwave faults
- Runs but doesn’t heat — magnetron, high-voltage diode, or high-voltage capacitor.
- Sparks inside the cavity — worn waveguide cover or damaged magnetron.
- Door switch fault — primary, secondary, or monitor switch (codes vary by brand).
- Turntable doesn’t turn — drive motor, coupler, or support roller.
- Control panel dead or flickering — control board or ribbon cable.
- Vent fan won’t turn off — relay or board fault.
- Light bulb out (incandescent or LED) — bulb or driver, depending on model.
Counter-top vs. over-the-range vs. built-in
Counter-top units under $200 are usually replaced rather than repaired — the labor and parts make the math close to even. Over-the-range and built-in units are the typical repair calls because replacement runs $400–$1,200 and most faults are well under that to fix. The technician is direct about which way the math leans.
Brands serviced
Whirlpool, GE, GE Profile, Samsung, LG, Frigidaire, Bosch, KitchenAid, and Kenmore. Sharp built-in drawer microwaves are serviced when parts ship from out of state.
Where service runs
Daily routes through Bismarck and Mandan; weekly through Lincoln, Washburn, Hazen, Beulah, Wilton, Center, New Salem, Garrison, Underwood, and Linton. Full service area list.
Common questions
Is it worth repairing a microwave or just buying a new one?
For a countertop microwave under $200, replacement is usually the right call. For an over-the-range or built-in microwave, repair almost always wins — the unit itself runs $400–$1,200 to replace, and the most common failures (door switches, magnetrons, control boards) are well under that to fix.
Sparks inside the microwave — is that dangerous?
Stop using it. Sparks are usually a worn mica waveguide cover or a damaged magnetron. Both are repairable, but running the unit further can damage the cavity and turn a $150 fix into a replacement.
My microwave runs but doesn’t heat anything.
Most often a failed magnetron, a high-voltage diode, or a high-voltage capacitor. The diagnostic involves discharging the high-voltage components safely first; this is not a do-it-yourself repair, even with the unit unplugged.
Over-the-range microwave with a flickering display — what is it?
Usually a failing control board or a loose ribbon cable behind the panel. Boards are stocked locally for the common Whirlpool, GE, and Samsung models.