Repair or Replace Your HVAC System? A Decision Framework

Start with four questions

• Age: how old is the system relative to its typical lifespan?
• Repair cost: is this repair a small or large share of a new system?
• Frequency: is this the first issue, or one of several recent ones?
• Efficiency & comfort: are bills climbing or rooms uneven?

The age and cost rule of thumb

Furnaces commonly last about 15–20 years; air conditioners and heat pumps about 12–15. A common guideline: if a repair costs more than about a third to half of replacement — and the unit is past the midpoint of its life — replacement usually makes more financial sense.

These are general industry guidelines, not a quote. We give you repair and replacement options side by side so you can decide.

When repair is the smart call

• The system is well within its expected lifespan
• It's an isolated, modest repair (a capacitor, igniter, sensor)
• The system has otherwise been reliable and efficient

When replacement usually wins

• The unit is near or past its expected lifespan
• A major component (compressor, heat exchanger) has failed
• You've had multiple repairs in a short span
• Energy bills are climbing and comfort is declining
• It uses a refrigerant that's being phased out, raising future repair costs