Start with What the Appliance Costs to Replace
The math for a luxury appliance is different from a builder-grade one. A base-model refrigerator might cost a few hundred dollars to replace, so a large repair is a close call. A built-in Sub-Zero, a Wolf range, or a Thermador wall oven is a different story: replacing one often means several thousand to well over ten thousand dollars once installation and cabinetry are counted, because these units are integrated into the kitchen rather than dropped into a slot. Against that number, a repair that restores years of service is usually the clear winner.
The second factor is what actually failed. Most faults on premium appliances are a discrete part: an evaporator fan, a defrost heater, a temperature sensor, an igniter, a control board, a door gasket. These are the kinds of repairs where a modest part cost, sometimes forty or sixty dollars for the part itself, saves the entire appliance. The exception is the sealed refrigeration system. A failed compressor or a refrigerant leak deep in the system is a larger repair, and on a very old unit it is the one case where replacement deserves serious thought.
A Quick Framework
| Situation | Lean Toward | Why |
|---|---|---|
| Built-in unit, discrete part failed | Repair | Part cost is small against replacement |
| Unit under 15 years, cosmetically sound | Repair | Years of service remain |
| Sealed-system failure on a 20-plus-year unit | Consider both | Larger repair; weigh against a new unit |
| Parts discontinued and no substitute | Consider replace | Future repairs may be limited |
| Repeated unrelated failures, very old unit | Consider replace | End-of-life pattern |
The Role of a Written Estimate
The honest way to make this decision is to diagnose first and decide second. A proper diagnostic identifies the exact fault and the part it needs, which turns a vague worry into a specific number. Diagnostic and travel fees, if applicable, are confirmed before the appointment and before repair approval. If the diagnosis points to a failing sealed system on a decades-old unit, we will say so plainly rather than sell a repair that does not make sense. Most of the time, though, the appliance is worth keeping, and a single correct repair with genuine OEM parts returns it to reliable service.
Not Sure Whether to Fix It?
Book a diagnostic visit. Diagnostic and travel fees, if applicable, are confirmed before the appointment and before repair approval.
Frequently Asked Questions
Is It Worth Repairing a 15-Year-Old Sub-Zero?
Usually yes. A Sub-Zero is built to last far beyond 15 years, and most faults at that age are a fan, defrost part, gasket, or control rather than the sealed system. The repair cost is typically a fraction of replacing a built-in unit, so keeping it is generally the better value.
When Does Replacement Actually Make Sense?
Replacement is worth considering when a decades-old unit has a failed sealed system such as a compressor or a deep refrigerant leak, when parts have been discontinued with no substitute, or when an old appliance is showing repeated unrelated failures. Even then, a diagnosis first tells you the real number so you can decide with facts.
Do You Charge for the Repair-Or-Replace Assessment?
Diagnostic and travel fees, if applicable, are confirmed before the appointment and before repair approval. That means the assessment effectively costs nothing if you go ahead with the fix, and you get an honest opinion either way.