Microwave Repair Guide

Microwaves are relatively cheap to replace, but some fixes cost under $20. Warning: microwaves store lethal voltage in the capacitor even when unplugged. Always discharge before servicing.

Avg Lifespan

7-10 years

Replace Cost

$100-500

Common Fixes

3 problems

Common Problems

80% likely hard 30-45 minutes

Not Heating

Microwave runs but food stays cold

Cause: Failed magnetron or blown thermal cutout

Parts from

$45

See Fix →

65% likely easy 10-15 minutes

Turntable Not Spinning

Plate doesn't rotate during operation

Cause: Broken turntable motor or misaligned roller guide

Parts from

$18

See Fix →

50% likely easy 5-10 minutes

Sparking Inside

Arcing or sparks visible inside the microwave cavity

Cause: Damaged waveguide cover or metal debris inside

Parts from

See Fix →

Is It Worth Fixing?

A microwave replacement costs $100-500. Most common repairs cost $10-50 in parts. If your unit is less than 7-10 years old, repairing it is almost always the better financial decision. Even if you're not comfortable with DIY repairs, a service call ($100-200) plus parts is still cheaper than replacing the entire unit.

When to replace: If the unit is past its expected lifespan, has had multiple failures, or the compressor/motor needs replacing (these are expensive components that signal end-of-life).

Brands We Cover

GEWhirlpoolSamsungLGPanasonic

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Oven / Range

3 fixes

Frequently Asked Questions

How long does a microwave typically last?

A typical microwave lasts 7-10 years. With regular maintenance, many last even longer. If yours is approaching the end of its expected lifespan and a major component fails (compressor, motor), replacement may be more cost-effective.

Is it worth repairing a microwave or should I replace it?

If the repair costs less than 50% of a new microwave ($100-500) and the unit is under 75% of its expected lifespan (7-10 years), repair is usually the better choice. Most common microwave repairs cost $10-50 in parts.

Can I fix a microwave myself?

2 of 3 common microwave problems are rated "easy" and can be fixed by most homeowners with basic tools (screwdriver, multimeter). Always disconnect power before starting any repair.

What tools do I need to repair a microwave?

Most microwave repairs require a multi-bit screwdriver, adjustable wrench, and multimeter. Total tool investment: under $50. We list the specific tools needed for each repair in our guides.