Heat pump maintenance matters because a heat pump works harder than a furnace or an air conditioner alone, because it runs in both winter and summer. Basic maintenance keeps it efficient and catches small problems before they turn into a failed compressor. Most of it takes a few minutes a month, and a professional tune-up once a year costs about $70 to $200.
Heat pump maintenance checklist
| Task | How often | Who |
|---|---|---|
| Check or replace the air filter | Every 1–3 months | You |
| Clear leaves, snow and debris from the outdoor unit | Monthly, and after storms | You |
| Keep 2 feet of clear space around the outdoor unit | Each season | You |
| Rinse the outdoor coil gently with a hose | Spring and fall | You |
| Check the condensate drain for clogs | Twice a year | You |
| Test heating and cooling modes before each season | Twice a year | You |
| Professional tune-up | Once a year (twice in extreme climates) | Technician |
What you can do yourself
1. Change the filter
A clogged filter is the most common cause of poor heating and cooling. It starves the indoor coil of air, raises energy use and, in winter, can trip the high-pressure safety switch. Check it monthly. Replace a 1-inch filter every one to three months, and a 4-inch media filter every six to twelve months.
2. Keep the outdoor unit clear
The outdoor unit needs air flowing through its coil. Cut back shrubs, rake away leaves and keep snow from drifting against it. In winter, make sure it sits above the snow line so defrost water can drain away. Never chip ice off the coil with a tool; the fins bend easily.
3. Clean the coil
Turn the power off at the outdoor disconnect, then rinse the coil from the inside out with a garden hose on a gentle setting. Pressure washers bend fins and are best avoided.
4. Watch the drain line
In cooling mode the indoor unit removes water from the air. If the drain line clogs, water can overflow or a float switch will shut the system off. Pouring a cup of diluted vinegar into the drain access twice a year helps prevent algae buildup.
What a professional tune-up includes
- Checking refrigerant pressures and temperatures (a low charge means a leak, which should be found and fixed, not just topped up)
- Testing capacitors, contactors and electrical connections
- Checking the reversing valve and defrost cycle
- Measuring airflow and the temperature change across the indoor coil
- Cleaning the indoor coil and blower if needed
- Checking backup heat strips
- Lubricating motors that need it
Heat pump maintenance cost
| Service | Typical cost |
|---|---|
| Single tune-up visit | $70 – $200 |
| Annual maintenance plan (1–2 visits) | $120 – $360 per year |
| Capacitor replacement | $100 – $250 |
| Refrigerant leak repair and recharge | $100 – $600+ |
| Outdoor fan motor | $200 – $700 |
| Compressor replacement | $1,300 – $2,500+ |
Maintenance plans often include priority service and a discount on repairs. They are worth it if they cost about the same as two separate tune-ups. Some manufacturers require proof of yearly maintenance to honor the parts warranty, so keep the receipts.
Signs your heat pump needs service now
- It runs constantly but the house stays cold or warm
- It is blowing cold air in heat mode for more than a few minutes
- Ice covers the whole outdoor coil for hours
- Grinding, squealing or loud buzzing
- Your electricity bill jumps without a change in weather
- The breaker trips repeatedly
Does maintenance really save money?
Yes. A dirty filter and coil can raise energy use by 10 to 25 percent. On a system that costs $1,200 a year to run, that is $120 to $300, which covers the tune-up. More importantly, a technician who spots a failing capacitor or a slow leak can save you from a compressor replacement. A well-maintained heat pump typically lasts 15 years or more.
Related: heat pump not heating, how long heat pumps last.