When to Replace Your Heat Pump
Average lifespan, warning signs, and whether to repair or replace.
Average Lifespan
10-15 years
Replacement Cost
$4,000 - $8,000
Category
Home
How Long Does a Heat Pump Last?
Heat pumps last 10 to 15 years on average, which is shorter than a furnace (15 to 20 years) or boiler (15 to 30 years) because a heat pump runs year-round... heating in winter and cooling in summer. A furnace sits idle for 5 to 7 months. A heat pump never gets a break. That constant operation puts more wear on the compressor, reversing valve, and fan motors. There are two main types. Air-source heat pumps are the most common and transfer heat between indoor and outdoor air. They cost $4,000 to $8,000 installed and work well in moderate climates. The latest cold-climate models (from Mitsubishi, Daikin, and others) now operate efficiently down to -15 degrees Fahrenheit, making them viable in northern states where older models couldn't keep up. Ground-source (geothermal) heat pumps use underground loops instead of outdoor air and last 20 to 25 years because the underground temperature is stable year-round (50 to 60 degrees in most regions). The ground loops themselves last 50+ years. Geothermal systems cost $15,000 to $30,000 installed but use 25 to 50% less electricity than air-source... the federal tax credit (currently 30% through 2032) significantly offsets this cost. The efficiency rating for heat pumps is HSPF (Heating Seasonal Performance Factor) for heating and SEER for cooling. A minimum-efficiency unit today has an HSPF of 8.8 and SEER of 15. High-efficiency models hit HSPF 13+ and SEER 20+. The difference in operating costs between a 15 SEER unit and a 20 SEER unit is roughly 25%... on a $200/month cooling bill, that's $50/month. Mini-split (ductless) heat pumps are gaining popularity for homes without ductwork or for single-room additions. They're also highly efficient because they avoid the 20 to 30% energy loss associated with ductwork. A single-zone mini-split costs $3,000 to $5,000 installed.
Warning Signs It's Time to Replace
If you're seeing two or more of these, it's time to start shopping.
- ⚠️System can't maintain set temperature — If the heat pump runs constantly but the house won't reach the thermostat setting, the system has lost capacity. Low refrigerant from a leak, a failing compressor, or a malfunctioning reversing valve are the common culprits.
- ⚠️Ice buildup on the outdoor unit that doesn't defrost — Heat pumps naturally frost up in heating mode and periodically run a defrost cycle to clear it. If the unit stays iced over, the defrost control, reversing valve, or outdoor fan motor has failed.
- ⚠️Higher than normal electric bills — When a heat pump loses efficiency, the backup heat strips (electric resistance heat) run more to compensate. Electric resistance heat costs 2 to 3 times more to operate than the heat pump... your bill will spike noticeably.
- ⚠️Short cycling (turning on and off rapidly) — The system runs for a few minutes, shuts off, then restarts shortly after. Causes include low refrigerant, a dirty filter restricting airflow, a failing compressor, or an oversized system.
- ⚠️Strange sounds from the outdoor unit — Grinding indicates bearing failure in the fan motor or compressor. Hissing suggests a refrigerant leak. A clicking sound when the system switches between heating and cooling modes may indicate a sticking reversing valve.
- ⚠️Excessive use of auxiliary/emergency heat — If the "aux heat" or "emergency heat" indicator on your thermostat is on frequently during moderate weather (above 35 degrees), the heat pump isn't carrying the load and something is wrong.
Should You Repair or Replace?
Heat pump repairs follow the same logic as AC systems because they share the same core components. Capacitor ($150 to $300), contactor ($100 to $250), fan motor ($200 to $500), and defrost control board ($200 to $400) are all reasonable repairs on a system under 10 years old. Refrigerant leak repair and recharge costs $200 to $1,500 depending on the leak location... a leak in the evaporator coil or line set is expensive, while a leaky Schrader valve is cheap. The reversing valve is unique to heat pumps and costs $400 to $800 to replace... it's worth doing on systems under 8 years old. The compressor is the line in the sand, same as with AC systems. A heat pump compressor replacement costs $1,500 to $3,000. On a system over 10 years old, that money is better spent toward a new system. A full heat pump replacement costs $4,000 to $8,000 for air-source and $15,000 to $30,000 for geothermal (before tax credits). If your current system uses R-22 refrigerant, replace rather than repair... the refrigerant cost alone makes continued operation uneconomical. When replacing, consider upgrading to a cold-climate heat pump if you're in a northern state. Models like the Mitsubishi Hyper-Heat maintain rated capacity down to 5 degrees Fahrenheit and produce heat down to -15 degrees. This may let you eliminate or significantly reduce your backup heat source, saving money long-term. The 30% federal tax credit for heat pumps (through the Inflation Reduction Act) applies to both the equipment and installation labor... on an $8,000 system, that's $2,400 back.
🔧 Repair if...
- • It's less than 6 years old
- • This is the first major issue
- • Repair cost is under $1,200 - $2,400
- • The rest of the unit is in good shape
🔄 Replace if...
- • It's past 10 years
- • This is the second or third repair
- • Repair quote is over $2,000 - $4,000
- • Newer models would save you money on energy
Replacement cost: A new heat pump typically costs $4,000 - $8,000 installed. Prices vary by region, brand, and complexity of installation.
Cost to Replace a Heat Pump
Full Replacement
$4,000 - $8,000
Labor is typically 55-65% of total cost
Typical Repair
$100 - $1,000
Depending on the issue and your location
Prices vary by region, brand, and complexity. Get at least 3 quotes before committing... and don't automatically go with the cheapest. A bad installation costs more in the long run.
How to Make It Last Longer
- ✓Schedule professional maintenance twice a year... once in spring for cooling mode and once in fall for heating mode. Heat pumps need servicing twice as often as AC-only systems because they run year-round.
- ✓Keep the outdoor unit clear of leaves, snow, and debris... maintain 2 feet of clearance on all sides and ensure the unit is elevated above expected snow depth in northern climates.
- ✓Change the air filter every 1 to 2 months... heat pumps are more sensitive to airflow restriction than furnaces because the temperature differential across the coil is lower.
- ✓Don't set back the thermostat dramatically with a heat pump... a 5-degree setback causes the system to use expensive electric resistance backup heat to recover. Set back 2 degrees max or use a heat pump-compatible smart thermostat.
- ✓Check that the defrost cycle is working in winter by observing the outdoor unit... it should periodically switch to cooling mode (you'll hear the reversing valve click and see steam as ice melts) and then return to heating.
What We Recommend
Products that help with heat pump maintenance and replacement.
Emerson Sensi Touch Smart Thermostat
Heat pump-compatible smart thermostat with intelligent recovery that avoids triggering expensive auxiliary heat during temperature recovery. Proper thermostat management saves hundreds per year on heat pump systems.
View on Amazon →
Diversitech Heat Pump Riser Pad
Elevates the outdoor unit 3 inches off the ground to prevent snow and ice buildup around the base. Essential in cold climates where snow drifts can block the coils and fan.
View on Amazon →
Supco SPP6E Hard Start Kit
Reduces compressor startup stress by up to 50%. Especially beneficial for heat pumps because the compressor starts and stops more frequently than an AC-only system.
View on Amazon →
Prices are approximate and may change. As an Amazon Associate we earn from qualifying purchases at no additional cost to you.
Related Guides
Lifespans and costs are averages based on industry data. Your results may vary based on brand, usage, climate, and maintenance. Consult a professional for specific advice.