Should I repair or replace my heat pump?

By Dana Whitlock. Updated October 13, 2026. How we work.

A heat pump works two shifts

A 10-year-old heat pump is already about two thirds of the way through DOE's average life. It's an air conditioner that also runs backward to heat the house, so the compressor and outdoor fan put in hours in July and January alike. DOE's lifetime estimates for split-system heat pumps show the wear: about 16.4 years in the North, 15.4 years in the hot-dry region and 15.1 years in the hot-humid region, several years short of DOE's figures for central air conditioners. Other industry charts put heat pumps between 10 and 16 years.

So when you run repair-or-replace numbers, give a heat pump fewer remaining years than an AC of the same age.

Cheap parts, routine fixes

Plenty of heat pump problems trace back to parts that are cheap next to the system. If the heat pump is still well inside its expected life, these are routine fixes.

• Defrost sensor or defrost control board, when ice builds up on the outdoor coil and never clears.
• Capacitor, contactor or outdoor fan motor.
• A thermostat set up wrong for a heat pump, or one that has failed.
• A burned-out backup heat strip in the air handler.
• Indoor blower motor on a system under about 10 years old.
• A single refrigerant leak that a technician can find and repair, on a newer system.

Failures that usually point to replacement

The expensive failures are the compressor, the reversing valve and the coils. Each one means opening the refrigerant circuit: recovering refrigerant, brazing, pulling a vacuum, recharging. On an older system the labor alone eats most of the value.

• Compressor failure out of warranty on a system past about 10 years.
• A stuck reversing valve on an older system, leaving it locked in heating or cooling.
• Repeated refrigerant leaks, or a leaking indoor or outdoor coil.
• Any major sealed-system repair on a system that uses R-22.
• A system that leans on backup electric heat for much of the winter even when nothing is broken. That usually means it's undersized or wrong for your climate.

A worked comparison

Cost per remaining year does the sorting. Divide the repair quote by the years the old heat pump is likely to keep going. Divide the replacement cost shown above by the years a new one should last, about 15 by DOE's numbers. Lower number wins.

A 5-year-old heat pump has a failed defrost board, quoted at about 4 percent of a new system. With 10 or so years left, that's 0.4 percent per year. A new system over 15 years costs about 6.7 percent per year. Repair without a second thought.

An 11-year-old heat pump has a stuck reversing valve, out of warranty, quoted at about 25 percent of the replacement figure for your area. Realistic remaining life is maybe 3 or 4 years. Twenty-five percent over 3.5 years is a little over 7 percent per year, already above the 6.7 percent a new system costs. And the compressor is just as old as the valve. Replace.

Running costs count too. A system that has been leaning on its electric backup heat burns money every winter month, since resistance heat costs far more to run than the heat pump itself. DOE's air-source heat pump page cites a Northeast study in which cold-climate heat pumps saved about 3,000 kWh a year compared with electric resistance heat. Savings on that scale tilt the comparison toward replacing.

The calculator on this page applies the same method to your quote and local replacement estimate.

Where the 50 percent rule fits

The usual shortcut is to replace when a repair costs more than half of a new system. For a heat pump past about 10 years, set the bar a little lower, because the remaining life is shorter than an AC's. On a young system with the compressor under warranty, the rule can mislead. A warranty part may turn a big quote into mostly labor.

What changes the call

Refrigerant. Older heat pumps may use R-22, which federal rules at 40 CFR 82.15 have kept out of newly manufactured equipment since 2010. Existing systems can be serviced with used, recovered and recycled R-22, but supply is limited. Most systems from about 2010 to 2024 use R-410A. EPA's HFC rule at 40 CFR 84.54 restricts installation of new residential heat pump systems using refrigerants with a GWP of 700 or more from January 1, 2025, with an allowance for systems built entirely from pre-2025 components. Repairs to existing systems aren't restricted. New systems use A2L refrigerants such as R-454B and R-32, so a new outdoor unit usually needs a matching indoor coil.

Cold-weather performance. Older heat pumps lose capacity fast once it freezes. DOE notes that cold-climate heat pumps are designed to keep working at temperatures as low as 5 degrees Fahrenheit. If your system struggles every winter, a cold-climate model can cut how often the backup heat strips kick on.

Efficiency standards. Federal minimums for central heat pumps changed on January 1, 2023, with ratings now in SEER2 and HSPF2. A mid-2000s heat pump is far less efficient in both modes than current equipment.

Warranty status. Compressors often carry longer parts warranties than other components, and registration can decide coverage. Check before assuming a compressor failure means a whole new system.

Dual-fuel setups. Paired with a gas furnace, a heat pump may run fewer winter hours and last closer to an AC's life. Plan the replacement of both pieces together, since the coil sits on the furnace.

Safe checks before you call

Make sure the thermostat is in the right mode and configured for a heat pump. Swap a dirty filter. Clear snow, leaves or debris from around the outdoor unit. Reset a tripped breaker once, and if it trips again, leave it off. Light frost that melts off during defrost is normal. A thick block of ice that stays put is a service call. Electrical and refrigerant work belongs to a licensed HVAC technician.