A Thermador is usually worth repairing when the repair costs less than half the price of a comparable new appliance and the unit is not near the end of its typical life. If the quote is more than half, or the appliance is well past its expected age, replacing it is usually the better choice.

Last updated: November 2, 2026

What is the 50% rule?

The rule is simple: compare the repair quote with the price of a comparable new appliance. HomeGuide says repairs that cost more than 50% of a replacement, or appliances more than 10 years old, typically are not worth repairing. A comparable new Thermador costs more than a typical appliance, so the 50% line sits higher and more repairs pass the test.

How old is too old to repair?

Age matters because older appliances are closer to the end of their typical life. The table uses InterNACHI’s published life expectancy ranges, which cover all brands and are not Thermador-specific. The repair and replace columns are our reading of those ranges, to be combined with the 50% rule.

Appliance Typical lifespan (all brands) Repair if the unit is younger than Judge by the 50% rule between Lean toward replacing at
Refrigerator 9 to 13 years 9 years 9 to 13 years 13 years or more
Freezer 10 to 20 years 10 years 10 to 20 years 20 years or more
Gas oven 10 to 18 years 10 years 10 to 18 years 18 years or more
Gas range 15 to 17 years 15 years 15 to 17 years 17 years or more
Electric range 13 to 15 years 13 years 13 to 15 years 15 years or more
Cooktop, ice maker, wine cooler No published figure found Use the 50% rule Use the 50% rule Use the 50% rule

InterNACHI says its figures are guidelines only. HomeGuide uses 10 years as a general cutoff, which is earlier than the ranges above for some appliances.

When is repair the better choice?

  • The quote is under half the price of a comparable new unit.
  • The appliance is younger than the low end of its typical lifespan.
  • It has been reliable until now, and this is a single failed part.
  • It is a built-in unit, where replacement may mean new cutouts or installation work.

When is replacing the better choice?

  • The quote is more than half the price of a comparable new unit.
  • The appliance is at or past the high end of its typical lifespan.
  • Repairs are repeating. Add up the total, not just the latest quote.
  • The problem is a major component and the unit is already older.

What should I ask before I decide?

Ask Why it matters
What is wrong, and what part fixes it? You compare a specific repair to the price of a new unit.
What is the total price, in writing? The 50% rule needs the full cost, including the visit.
Is the part original Thermador or aftermarket? It affects what you are buying.
Is the work itself warranted? Ask for the terms of any warranty on the repair in writing.
Is this unit still under the manufacturer warranty? Covered repairs may be free. Check your warranty paperwork first.

Where can I get a Thermador diagnosed?

A diagnosis gives you the number for the 50% rule. We repair refrigerators, freezers, ovens, ranges, stoves, cooktops, ice makers and wine coolers. For national price ranges, see our Thermador repair cost guide. For how long appliances last, see our lifespan guide.

Where do we repair Thermador appliances?

Thermador Repair Group repairs Thermador appliances in the areas covered by our city pages:

To check your address, contact us or call (855) 920-0838.

Frequently asked questions

Is it worth repairing a Thermador?

It is usually worth repairing when the quote is under half the price of a comparable new appliance and the unit is not near the end of its typical life. Above that, replacement often makes more sense. Ask for the quote in writing before you decide.

What is the 50% rule for appliance repair?

The 50% rule says repairs that cost more than half the price of a comparable new appliance are usually not worth it. HomeGuide applies the same idea, and also says appliances more than 10 years old typically are not worth repairing. Treat it as a guideline, not a law.

How long does a Thermador appliance last?

We have no Thermador-specific lifespan figure from a cited source. InterNACHI’s chart for all brands gives 9 to 13 years for refrigerators, 13 to 15 for electric ranges and 15 to 17 for gas ranges. It says these are guidelines only.

Should I repair a Thermador that has broken more than once?

Add up the repairs, not just the latest quote. If the total is approaching half the price of a new unit, or the same part keeps failing, replacing is worth considering. Ask the technician whether the repeat failures share a cause.

What should I ask before approving a repair?

Ask for the diagnosis, the part, the total price and the timing in writing. Ask whether the part is original or aftermarket, and whether the repair is covered by any warranty on the work. Also ask what else is likely to fail on a unit of that age.

Does an appliance still under warranty get repaired or replaced?

Under Thermador’s 2023 warranty statement, repair is the first remedy and replacement applies if reasonable repair attempts fail. Check your own warranty paperwork before paying for a repair.

Sources

Thermador is a trademark of its owner. Thermador Repair Group is an independent service company and is not affiliated with or endorsed by Thermador.