Your microwave is the appliance nobody thinks about until the morning it stops. It is also the appliance that fails most differently from everything else in the kitchen: a microwave that lights up, hums, and turns its tray while heating nothing is not partly working — it has a specific high-voltage fault, and no amount of cleaning or resetting will change that. Bozmanfix repairs countertop, over-the-range, built-in, and drawer microwaves from every major brand, and built-in and over-the-range units, where most of our microwave work sits, are almost always worth repairing.
Arcing that looks alarming is usually caused by the cheapest part in the machine. The waveguide cover — a small mica panel on the interior wall — absorbs grease and food splatter until it chars and begins to arc. Unplug it and stop using it: continued arcing burns the cavity itself, and cavity damage is what turns a small repair into a dead microwave.
Everything looks normal — the light is on, the fan runs, the tray turns — and the food comes out cold. This is the most common microwave fault, and it is always in the high-voltage circuit: the magnetron, the high-voltage diode, or the capacitor. It is never a setting or a program, which is why unplugging it to reset never helps.
Food heats unevenly with hot and cold spots, or the tray sits still while the microwave otherwise runs normally. The cause is mechanical rather than electrical — a failed turntable motor, a cracked drive coupler, or a worn roller ring. On over-the-range units we check the vent fan and grease filter at the same visit, because blocked airflow above a cooktop causes overheating faults later.
A dead display and no response to any button is usually a safety component doing its job. Every microwave has interlock switches that must confirm the door is closed, plus a thermal fuse and a line fuse designed to fail before anything expensive does. A worn door latch or one failed interlock shuts the whole appliance down while everything else is healthy — a far more common cause than a failed control board.
Your microwave is the appliance nobody thinks about until the morning it stops. It is also the appliance that fails most differently from everything else in the kitchen: a microwave that lights up, hums, and turns its tray while heating nothing is not partly working — it has a specific high-voltage fault, and no amount of cleaning or resetting will change that. Bozmanfix repairs countertop, over-the-range, built-in, and drawer microwaves from every major brand, and built-in and over-the-range units, where most of our microwave work sits, are almost always worth repairing.
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A microwave repair runs a median of $376, and the diagnostic visit is $76 rather than our usual $99. Built-in and over-the-range microwaves are almost always worth repairing, because replacing one means cabinet and venting work on top of the appliance. On a countertop unit you get the full price before any work starts.
| Amount | |
|---|---|
| Median repair, part replaced | $376 |
| Middle half of jobs | $265 to $527 |
| Microwave diagnostic visit | $76 |
From 99 completed microwave repairs where a part was replaced. Your exact part is priced on the visit, as one total with labour.
Built-in, over-the-range, drawer and speed-oven microwaves are the units we repair most, because for them a repair is almost always the better spend.
Countertop units are welcome too. The technician finds the fault, gives you the full price before any work starts, and you decide with that number in front of you.
The case for repairing an installed unit comes down to what replacing one actually involves.
Replacing a built-in microwave is not swapping an appliance, it is a small carpentry job. The unit is sized to a trim kit and a cabinet opening, and a replacement that is even slightly different in dimensions means modifying the cabinet. Over-the-range units add venting, either ducted to the outside or recirculating, plus mounting hardware and a wall plate, and they are heavy enough to be a two-person install.
So the arithmetic reverses. A $376 repair against an appliance that costs several times that, plus fitting, plus possible cabinet work, is straightforwardly worth doing.
A fuller walkthrough of the not-heating case, which is by far the most common complaint, is on microwave not heating. A unit that has started to smell, whether that is trapped food, loaded grease filters or something closer to burning, is on microwave smells bad.
Running it empty is the main one. With no food to absorb the energy, it reflects back into the magnetron, and a few seconds does no harm while repeated empty runs will kill it. This happens most often when someone uses the microwave as a timer.
Second, metal and foil. Beyond the immediate arcing, each event can pit the waveguide cover and damage the interior coating, which then arcs more easily afterwards. A microwave that has started sparking with ordinary food usually has a history.
Third, letting spills bake onto the roof and the waveguide cover. That small mica panel on the side or top wall is a functional part, not trim, and food carbonised onto it is the most common cause of arcing we find. Wipe it. If it is already burnt through, it needs replacing rather than cleaning.
And on over-the-range units, the grease filters. A blocked filter makes the fan work against resistance and pushes heat back into the cabinet above the range, which is a hot environment for electronics already.
Built-in, over-the-range, drawer and countertop microwaves, plus the microwave side of combination and speed ovens, from all major manufacturers. On countertop units the technician gives you the full price before any work, so you can weigh the repair against a new unit. Expected service life is on how long microwaves last.
An over-the-range microwave is also your range hood, and the extraction side fails far more often than the cooking side without anyone noticing. The fan slows, the grease filters clog, and the kitchen simply gets smokier over a period of months.
Worth knowing: many of these units are installed in recirculating mode, meaning they filter the air through a charcoal cartridge and blow it back into the room rather than venting outside. That cartridge is a consumable with a life of six to twelve months, and in most homes it has never been changed. If your extraction seems weak, that cartridge is the first thing the technician checks, and it is a quick consumable to replace.
The metal grease filters underneath are washable rather than disposable. They go in the dishwasher, and a clogged pair makes the fan work against resistance while pushing heat back into the cabinet where the electronics live.
Two formats we see increasingly, and both sit firmly on the repair side. A speed oven combines microwave and convection heating in one built-in cavity, and it is expensive enough that repair is always the right call. A microwave drawer, mounted below the counter and opening like a drawer, has a mechanism that a conventional microwave does not, and drawer rail and motor faults are the common complaint rather than anything on the cooking side.
Both are built-in appliances fitted to a specific opening, so the same logic applies as with any built-in unit: the fitting costs more than the appliance, and a repair at our median price is a fraction of replacement.
The $179 annual membership covers five free diagnostics a year, priority scheduling with a 24 to 48 hour response, $30 off labour on every repair and an extended warranty on Bozmanfix work.
How much does microwave repair cost?
The median microwave repair where a part is replaced is $376, with the middle half of jobs between $265 and $527. The diagnostic visit is $76, lower than our $99 standard for other appliances. The technician prices your specific part on the visit, before any work starts.
Is it worth repairing a microwave?
A built-in or over-the-range microwave is worth repairing almost every time, because replacing one means matching a cabinet opening or re-doing venting and mounting, which costs far more than the appliance alone. On a countertop unit you get the full price before any work starts, so you can compare it with a new one.
My microwave runs but does not heat the food. What is that?
Demo or showroom mode produces exactly this symptom: the display lights, the turntable turns, the fan runs, and the magnetron is disabled by design. The technician rules that out first. If it is not demo mode, the fault is usually in the magnetron or the high-voltage circuit, which is technician work.
Can I take the cover off my microwave to look inside?
No. A microwave holds a high-voltage capacitor that stores a lethal charge and retains it after the unit is unplugged. Unlike other appliances, disconnecting from the wall is not sufficient to make it safe, and there is no user-serviceable part behind the outer case. Everything past the door and control panel needs the correct discharge procedure.
My microwave is sparking inside. What should I do?
Stop using it. The usual cause is a burnt waveguide cover, the small mica panel on the wall or roof of the cavity, or interior paint damage exposing bare metal. Both worsen with every use, and the mica panel is a functional part that needs replacing rather than cleaning once it is burnt through.
Why does my microwave keep failing?
The most common avoidable cause is running it empty, often when it is used as a kitchen timer: with nothing to absorb the energy it reflects back into the magnetron. After that, arcing from metal or foil pits the waveguide cover, and baked-on spills on that panel cause further arcing. On over-the-range units, blocked grease filters push heat back into the cabinet and shorten electronics life.
The light and fan work on my over-the-range microwave but it will not cook.
Those functions are independent of the cooking circuit, so the unit having power tells you nothing about the magnetron side. The technician checks demo mode and the door latch first, since interlock switches must all confirm the door is closed before heating is allowed, and then moves to the high-voltage side.
Book a microwave technician online or by phone, and you get the full price before any work starts.
Book online (470) 516-3390Vadym
Our technician
Vadym is the best! He fixed our broken refrigerator with ease and went above and beyond with his exceptional customer service. We highly recommend him and will definitely be using his services again. Thank you, Vadym!
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Eugene
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Eugene is the definition of efficiency. He came to fix our dishwasher and had it running smoothly in no time. Not only was he fast, but he was also friendly and made sure to explain the problem and solution in detail. Thank you, Eugene, for your fantastic service.
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Elvar
Our technician
Elvar did a great job fixing our washing machine. He was prompt and took care to thoroughly diagnose the issue before getting to work. While there were a few small hiccups along the way, Elvar remained professional and worked to resolve them quickly. We were very pleased with his overall performance and would definitely recommend him. Thanks, Elvar!
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Michael
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Michael was a lifesaver when it came to fixing our oven. He arrived on time, was professional, and got the job done quickly. We were impressed by his knowledge and expertise. Thank you, Michael, for your excellent service
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