Lifespan guide

How long does a microwave last?

The average microwave lasts 9 years with proper maintenance. Below: common failures, expected repair costs, and tips to extend service life.

Expected lifespan
9 yrs
Avg repair cost
$100–$350
Avg replacement
$350
Repair success
70%

Common failures

  • ·Magnetron failure
  • ·Door switch
  • ·Diode/capacitor
  • ·Turntable motor

Maintenance tips to extend lifespan

  • Wipe interior weekly
  • Don't run empty
  • Replace if magnetron fails on units <$300

When to replace

If your microwave is over 6 years old and the quoted repair exceeds $140, replacement is typically the better long-term value. Use our repair vs replace calculator for a personalized recommendation.