A & B Appliance Repair
22 yrs in businessLouisville, KY
Refrigerator Repair · Washer Repair · Dryer Repair +3 more
Appliance repair
Microwaves sit right on the repair-or-replace boundary. Countertop units are almost always replaced; built-in and over-the-range models are almost always worth repairing. Either way, the high-voltage capacitor holds a lethal charge long after unplugging — this is not a DIY appliance.
209 of the 873 businesses in this directory list microwave repair, across 50 states and 106 cities. Below them: what actually fails, what the repair costs, and when replacing is the better call.

The 12 highest-rated of 209 businesses that service microwaves. Call the number on the listing — we never take a cut.
Louisville, KY
Refrigerator Repair · Washer Repair · Dryer Repair +3 more
Torrance, CA
Refrigerator Repair · Washer Repair · Dryer Repair +9 more
Stamford, CT
Refrigerator Repair · Washer Repair · Dryer Repair +3 more
Tampa, FL
Refrigerator Repair · Freezer Repair · Washer Repair +5 more
Overland Park, KS
Washer Repair · Dryer Repair · Refrigerator Repair +7 more
Longwood, FL
Refrigerator Repair · Washing Machine Repair · Dryer Repair +6 more
Birmingham, AL
Refrigerator Repair · Washer Repair · Dryer Repair +3 more
Indianapolis, IN
Refrigerator Repair · Washer Repair · Dryer Repair +4 more
Orlando, FL
Cooktop Repair · Dishwasher Repair · Dryer Repair +7 more
Atlanta, GA
Refrigerator Repair · Washer Repair · Dryer Repair +6 more
Addison, TX
Refrigerator Repair · Freezer Repair · Washer Repair +9 more
Ann Arbor, MI
Refrigerator Repair · Washer Repair · Dryer Repair +6 more
197 more microwave repair businesses are indexed by state and city further down this page.
Symptom, the cause it most often turns out to be, and whether it is homeowner work or a job that has to go to a licensed technician.
The economics here are unusually clear. A countertop microwave costs $100–$250 new, and a diagnostic plus a magnetron is more than that, so replacement wins on nearly every fault. An over-the-range or built-in unit costs $400–$900 and is fitted into cabinetry, so a $200 repair is straightforward value. Establish which you own before anything else.
The safety point is not a formality. The high-voltage capacitor in a microwave stores enough energy to be fatal and holds that charge for a long time after the unit is unplugged. Every other appliance on this site has some homeowner-serviceable failures. On a microwave, essentially the only safe homeowner tasks are cleaning the waveguide cover, the filters, and the turntable.
Runs, lights up, turntable spins, but food stays cold
TechnicianThe magnetron, high-voltage diode, or capacitor has failed. The control side works because it is on a separate low-voltage circuit.
Step-by-step: Microwave Runs But Doesn't Heat →Completely dead, no display, no fan
TechnicianA blown line fuse — and that fuse is usually blown by a failing door interlock switch, so replacing the fuse alone rarely holds.
Loud buzzing or humming while heating
TechnicianA failing magnetron or a high-voltage transformer starting to break down. Stop using it and have it tested.
Sparking or arcing inside the cavity
TechnicianA burnt or missing waveguide cover, chipped cavity paint exposing bare metal, or metal in the food. Stop immediately — arcing damages the magnetron fast.
Step-by-step: Microwave Sparking Inside →Turntable does not rotate
TechnicianThe turntable drive motor or a stripped coupler. The one genuinely low-cost microwave fault.
Step-by-step: Microwave Turntable Not Turning →Runs on its own or stops as soon as the door is touched
TechnicianA worn door interlock switch or a door latch out of alignment. Interlocks are a radiation-containment safety system, not a convenience part.
Over-the-range unit no longer extracts steam
Homeowner fixGrease-saturated charcoal or aluminium mesh filters, or a failed vent fan motor. Filters are homeowner-replaceable.
Built-in unit tripping the circuit or scorching at the outlet
Licensed trade onlyA failing transformer drawing excess current, or an inadequate branch circuit. Fixed wiring is licensed electrical work.
Each item below maps directly onto a fault in the list above. This is the whole of microwave preventive maintenance — there is nothing else worth doing.
Wipe the cavity and check the waveguide cover for burn marks
WeeklyPrevents: Arcing, which destroys magnetrons quickly and permanently.
Wash or replace the grease filters (over-the-range)
Every 3 monthsPrevents: Loss of extraction and a vent motor running against a blocked path.
Replace the charcoal filter on recirculating models
Every 6–12 monthsPrevents: Cooking odours pushed back into the room.
Never run it empty, and keep a cup of water inside if children use it
AlwaysPrevents: The most common cause of early magnetron failure.
Check the door closes square and the latch engages cleanly
Every 6 monthsPrevents: Interlock switch failure, which is what blows the line fuse.
Free step-by-step guides and the replacement parts that fix most microwave faults, with realistic difficulty ratings.
6 more microwave repair guides cover the rest of the faults above.
| Part | Typical price | Difficulty |
|---|---|---|
| Turntable MotorLasts 8–12 years | $15–$30 | easy |
| Door Interlock Switch SetLasts 8–14 years | $10–$40 | moderate |
| Turntable Coupler and Roller RingLasts 5–10 years | $8–$30 | easy |
| Grease and Charcoal FiltersLasts Grease: wash monthly. Charcoal: 6–12 months | $12–$45 | easy |
| Cavity Lamp and SocketLasts 3–8 years | $5–$25 | easy |
| Vent Fan MotorLasts 8–14 years | $40–$140 | moderate |
| Control Board or TouchpadLasts 8–14 years | $50–$220 | moderate |
| MagnetronLasts 8–12 years | $55–$190 | advanced |
| High-Voltage Diode and CapacitorLasts 8–14 years | $10–$60 | advanced |
Counts are how many of the 209 businesses servicing microwaves name that brand. 38 distinct brands are covered in total, and 14 of these businesses hold a factory-authorized servicer credential.
Built-in and drawer microwaves from Sharp, Wolf, Miele and Thermador are trim-kit specific, so a replacement has to match the existing cabinet opening exactly. That is precisely why repairing them usually beats replacing them.
50 states with listed microwave repair businesses. Each opens a ranked list for that state.
106 cities have at least one listed microwave specialist. Ranked by how many.
National ranges for parts and labor together, before the diagnostic fee. Regional labor rates move these by roughly 20% either way, and no figure here is a quote.
| Repair | Parts + labor |
|---|---|
| Turntable motor or couplerThe cheapest genuine microwave repair. | $80–$160 |
| Door interlock switch setReplaced as a set; a single switch rarely fails alone. | $100–$200 |
| Line fuse plus the interlock that blew itFuse-only repairs usually fail again within weeks. | $100–$200 |
| Vent fan motor (over-the-range)Check the filters first — they mimic a dead fan. | $150–$300 |
| High-voltage diode or capacitorDischarging the capacitor safely is the whole reason this is not DIY. | $150–$280 |
| Magnetron replacementWorth it on a built-in; almost never on a countertop unit. | $150–$350 |
| Control board or touchpadOn a countertop model, price a new microwave first. | $180–$350 |
| Full over-the-range replacement and refitIncludes ducting and cabinet fit, which is why repair often wins. | $400–$900 |
Blue Book
A quote above $125 on a microwave past 6 years old is usually money better spent on a replacement. Below that line, and with life left on the clock, repair wins almost every time.
Estimate my microwave’s valueAdjusts for brand tier, age and condition. Free, no sign-up.
7–10 years. Over-the-range units land at the lower end because they run hot above a cooktop and their filters are neglected.
Running a microwave empty, or with almost nothing in it, is what kills magnetrons early — the energy has nowhere to go and reflects straight back into the tube. So does arcing from a burnt waveguide cover left in service.
Every listing above is a real business with a real phone number. Compare two or three on rating, licensing and years in business, then call the one that explains the job best — and tell them what you found in the fault list above.