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Heat Pump Lifespan

Why heat pumps work hard

Unlike a furnace or air conditioner that runs part of the year, a heat pump runs for heating and cooling. That means more compressor hours. Variable-speed units run long at low speed, which is gentler than frequent on-off cycling. Correct sizing reduces short cycling, a major source of wear.

Factors that shorten life

• Oversizing that causes short cycling.
• Refrigerant leaks or wrong charge.
• Restricted airflow from dirty filters or coils.
• Coastal salt air corroding coils and cabinets.
• Ice damage from poor drainage or roof drip.
• Power surges and voltage problems.
• Poor installation: unsealed line sets, kinked lines, improper evacuation.

Homeowner maintenance

• Check filters monthly in heavy-use seasons and replace or wash as directed.
• Keep 2 feet or the manual's clearance around the outdoor unit; clear leaves, snow and plants.
• Rinse the outdoor coil gently with a hose when off; avoid pressure washers.
• Make sure condensate drains flow freely.
• For mini-splits, wash filters often and watch for musty odours that suggest coil or blower cleaning is due.

Turn off power at the disconnect before cleaning around equipment. Leave electrical and refrigerant work to licensed technicians.

Professional maintenance

A yearly or twice-yearly service visit typically checks refrigerant pressures, electrical connections, capacitors, contactors, coil condition, defrost operation, blower and drainage. For mini-splits, a deep clean of the indoor coil and blower wheel every few years can restore airflow and prevent odours. Keep records; some warranties require proof of maintenance.

Signs of aging

Rising energy bills for the same weather, frequent repairs, longer run times, noisy compressor, refrigerant leaks and corrosion. Older units may use a refrigerant (R-22) that is no longer produced and costly to service. When repair costs approach a large share of replacement, compare options.

Repair or replace?

A simple rule some use: multiply the unit's age by the repair cost; if the result exceeds the cost of a new system, replacement deserves a look. Also consider efficiency gains: a new unit with higher HSPF2 may lower bills. Use the operating cost calculator to compare.

Worked example

Figures below are illustrative examples (2026-10-29), not quotes or guarantees.

A 13-year-old heat pump needs a compressor at $3,200. A new system is quoted at $13,000. Age × repair = 13 × 3,200 = 41,600, above the replacement cost, which suggests looking at replacement. If the new unit lowers yearly heating from 9,000 to 7,000 kWh, it saves about $300 per year at $0.15/kWh.

Related

See heat pump not heating, defrost mode and geothermal vs air source.

What wears out first

Compressors, fan motors, capacitors and control boards are the usual failure points. Capacitors and contactors are inexpensive parts that a technician can replace; a failed compressor on an older unit is often the point where replacement makes more sense than repair. Coil corrosion, especially near salt air, can also end a unit's life early.

Climate and usage

Units in climates where they run for both heating and cooling most of the year accumulate more hours than units used mainly for cooling. Coastal salt, heavy snow and ice, and installation under dripping roof edges all shorten outdoor unit life. Raising the unit, adding a snow cover over the top (never wrapping the coil) and keeping vegetation trimmed help.

Maintenance that extends life

Change or clean filters regularly, keep the outdoor coil clear of leaves and snow, and have a technician check refrigerant pressures, electrical connections and drain lines periodically. Small issues such as a weak capacitor or a slow refrigerant leak are cheap to fix early and damaging if ignored.

Repair or replace

A common rule of thumb compares the repair cost multiplied by the unit's age against the price of a new system; if the product is large, replacement may be sensible. Also weigh efficiency gains: a new unit may be meaningfully cheaper to run than a fifteen-year-old one. Ask for written quotes for both options.

Warranty records

Register the equipment with the manufacturer if required, keep the installation invoice and maintenance records, and note the model and serial numbers. Many warranties require registration within a set period and proof of regular maintenance.

Typical ranges

Published estimates commonly place air-source heat pump life somewhere around 10 to 20 years, depending on climate, installation quality and maintenance. Indoor air handlers often last longer than outdoor units. These are general ranges, not guarantees; a poorly installed unit can fail early and a well-kept one can exceed them.

Planning for replacement

If your unit is near the end of its expected life, start gathering quotes before it fails. Emergency replacements in the middle of winter leave little time to compare equipment, check rebate rules or schedule an energy evaluation.

Signs of an ageing unit

Rising bills for the same weather, more frequent repairs, louder operation, longer run times and rooms that no longer reach setpoint all suggest declining performance. Old units may also use refrigerant types that are being phased out, which can make recharging more expensive. Keep a log of service visits so you can see the trend.

Refrigerant changes

Newer equipment uses lower-impact refrigerants. Older units may be costlier to recharge as supplies of legacy refrigerants shrink, which can tip a repair-or-replace decision. Ask your technician which refrigerant your unit uses and whether parts and refrigerant remain readily available.

FAQ

Do mini-splits last as long as ducted units?

Similar ranges, with maintenance being key.

Does a cover help in winter?

Do not cover a heat pump in winter; it needs airflow to heat.

Does running 24/7 shorten life?

Variable-speed units are designed for long runtimes.

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