Should I Repair or Replace My Microwave?

When to Repair Your Microwave

Microwaves are the trickiest appliance to evaluate. They're relatively cheap to replace but contain high-voltage components that make DIY repair dangerous. That said, some repairs make sense:

Repairs That Might Be Worth It

• Turntable motor ($50-$100) — If the plate stops spinning but the microwave still heats, this is a cheap fix.
• Door switch ($50-$100) — Microwaves have multiple safety switches. If one fails, the unit won't run, but it's an affordable repair.
• Light bulb ($10-$30) — If the interior light is out, obviously just replace it.
• Over-the-range models — Built-in microwaves cost more to replace ($300-$600+), so repairs make more sense than for countertop units.

When to Replace Your Microwave

For most countertop microwaves, the math usually favors replacement:

Signs It's Time for a New Microwave

• Not heating (magnetron failure) — The magnetron is the heart of a microwave. Replacing it costs $100-$200+, often more than a new countertop unit.
• Sparking or arcing — While sometimes caused by metal or damaged interior paint, persistent sparking can indicate more serious problems.
• Any repair approaching $100+ on a countertop model — You can buy a decent new countertop microwave for $100-$150. Once repair costs hit that range, replacement makes more sense.
• Older than 7-8 years — Microwaves lose efficiency over time. If yours is struggling to heat food properly even when "working," it may be wearing out.

Common Microwave Issues & Repair Costs

Issue	Typical Cost	Severity
Not heating food	$75 – $200	High
Turntable not spinning	$50 – $125	Low
Sparking inside	$50 – $150	Medium
Door won't close	$50 – $150	Low
Display not working	$75 – $175	Medium

Countertop vs Over-the-Range vs Built-In

• Countertop microwaves: $50-$300 new. Repairs rarely make sense unless it's something simple like a turntable motor. These are basically disposable appliances.
• Over-the-range (OTR) microwaves: $200-$600 new, plus installation. Repairs make more sense here because replacement involves venting, mounting, and often electrical work.
• Built-in microwaves: $400-$1,000+ new. Definitely worth repairing for issues under $200 since replacement is expensive and involves cabinetry.

Safety Warning

Do not attempt to repair a microwave yourself. Microwaves contain high-voltage capacitors that can hold a lethal charge even when unplugged. Always have microwave repairs done by a qualified technician.

Microwave Repair FAQs

Is it worth fixing a microwave?

Honestly, usually no. Microwaves are the one appliance where I'd lean toward replacement most of the time. A new countertop microwave runs $80 to $200, and most repairs cost almost that much just for the service call. If you've got a built-in or over-the-range model that costs $400+ to replace, that changes the math.

When should I replace my microwave?

Replace it if the magnetron (the part that actually makes the microwaves) has failed, if you see sparking or smoke, if the door seal is damaged, or if the unit is more than 8 years old and acting up. For countertop models specifically, replacement almost always beats repair.

How much does microwave repair cost?

Microwave repairs run $50 to $400 depending on the issue. A simple fuse replacement is on the low end. A magnetron replacement is on the high end and often costs more than just buying a new countertop unit. Built-in and over-the-range microwaves are pricier to repair because of the install work involved.

Why is my microwave sparking?

Sparking usually means damaged interior paint, a broken waveguide cover, or a failing magnetron. Stop using it immediately, that's a fire risk. A waveguide cover is a cheap fix, but a failing magnetron typically means it's time to replace the whole unit.

How long should a microwave last?

Most microwaves last 7 to 10 years with normal use. Built-in and over-the-range models tend to last longer because they're better built, but they also cost more when something goes wrong.