Lifespan numbers online are wide because they depend on how hard the equipment works. In Sacramento, a heat pump runs through a long cooling season and a heating season, and attic ducts bake every summer. Here is what to expect and what shortens or extends it.
Heat pumps
A central heat pump commonly lasts somewhere around 10 to 15 years, and well maintained units can go longer. The reason it often lands at the shorter end compared with an air conditioner is simple: it runs in both seasons, so it accumulates far more operating hours and starts each year.
What shortens it here:
- Full afternoon sun on the outdoor unit and dust packing the coil
- Oversizing and short cycling, which multiplies compressor starts
- Low refrigerant left unrepaired
- Defrost problems that leave the coil iced
- Skipped filter changes
What extends it: correct sizing, a clean coil, sealed ducts, and service twice a year. See how often a heat pump needs service.
Ductless mini-splits
Ductless systems are often cited as lasting longer than central systems, commonly in the 15 to 20 year range when maintained. Inverter compressors ramp up and down gently instead of slamming on and off, which is easier on them.
In practice, the biggest factor in whether a mini-split reaches that is installation and cleaning. Poorly made flare connections leak refrigerant slowly. A drain line without slope leaks water. A head that is never cleaned loses airflow and strains the system. See how to clean a mini-split.
Ductwork
Ducts have the widest range of all, because they depend on what they are made of and where they are.
- Sheet metal duct in a protected space can last for decades, often the life of the house, though joints need resealing over time.
- Flex duct in a Sacramento attic has a much harder life. Summer attic temperatures break down the outer jacket and the insulation, and connections loosen. Flex duct from the 1990s and early 2000s is now at the age where we regularly find torn jackets, crushed runs and disconnected boots.
Signs your ducts are near the end:
- Brittle, torn or sagging flex duct in the attic
- Rooms that never get enough air
- Dust in the house that keeps coming back
- Water stains around ceiling vents in summer. See ducts dripping water.
Often sealing and partial repair extends ducts for years. See duct sealing versus replacement.
Air conditioners and furnaces, for comparison
Central air conditioners and gas furnaces are covered in their own guides: how long an air conditioner lasts and when to replace a furnace.
Repair or replace near the end of life
Age alone is not a reason to replace. The question is what the next repair costs compared with replacement, and what is likely to fail after it. A capacitor on a fourteen year old heat pump is worth replacing. A compressor usually is not. See compressor replacement cost and heat pump replacement cost.
What we do
We give you an honest read on remaining life, price the repair against replacement, and never push replacement on equipment that still has years in it. Replacement estimates are free, and the cost calculator gives a range in about a minute.
Frequently asked questions
How long does a heat pump last?
Commonly around 10 to 15 years, sometimes longer with good maintenance. Because heat pumps run in both seasons, they accumulate more operating hours than air conditioners.
How long do ductless mini-splits last?
Often cited in the 15 to 20 year range when properly installed and maintained. Installation quality and regular cleaning make the biggest difference.
How long does ductwork last?
Sheet metal ducts can last for decades. Flex duct in a hot Sacramento attic degrades much faster, and many systems installed around 2000 now show torn jackets and loose connections.
Why do heat pumps wear out faster than AC units?
They run for both heating and cooling, so they log more hours and more compressor starts each year.
Is it worth repairing a 12 year old heat pump?
It depends on the repair. Small parts like capacitors and contactors are worth replacing. A compressor or coil on an older unit usually is not.
How can I make my heat pump last longer?
Size it correctly, keep the filter and outdoor coil clean, seal the ducts, repair refrigerant leaks and have it serviced in spring and fall.