Deciding whether to repair or replace an old microwave

Symptoms

• Microwave is several years old and having a significant failure like no heat or a control board issue
• Repair quote is a large fraction of what a new microwave costs
• Multiple issues have come up recently
• Basic function (turntable, light) may still work, but core heating or safety systems have failed

Likely causes

• CommonMagnetron or high-voltage component failure on an older unitThese are among the more expensive parts to replace and often make repair less economical on cheaper or older microwaves.
• CommonMicrowave nearing or past typical lifespanMost countertop microwaves are expected to last around 7–10 years with regular use.
• CommonLow original cost of the unit relative to repair costBasic microwaves are inexpensive new, which changes the repair math compared to higher-end or built-in models.

What to do

1. Get a specific repair quote, especially for magnetron, transformer, or control board issues, which tend to be the pricier repairs.
2. Compare that quote to the price of a similar replacement microwave with the features you need.
3. Factor in the microwave's age; a basic countertop unit over about 7–10 years old often isn't worth a costly repair.
4. For built-in or over-the-range models, which cost more and are more involved to replace, a repair is more often worth it even at a higher price.
5. Consider whether multiple issues have appeared recently, which can suggest broader wear rather than one isolated fixable fault.
6. If it's a lower-cost countertop unit and the repair approaches half or more of a new unit's price, replacement is usually the better value.

When to call a pro

A technician can give you an accurate repair quote and an honest opinion on whether it's worth fixing versus replacing, especially for built-in models.

Safety