CostBeaverHeat Pump Maintenance: What You Can Do, and When to Call a Pro
HVAC TIPSHeat pump maintenance comes down to one habit and one appointment. Change the filter every one to three months, keep the outdoor unit clear of leaves and pollen, and book a professional tune-up before each season. Because a heat pump runs almost year-round down here, staying on top of it protects both the heating and the cooling side.
The short version
- The filter is the whole game. A clogged one chokes airflow and is the top reason heat pumps die early, so check it monthly and change it every 1–3 months.
- A heat pump runs in summer and winter, so it wants two visits, not one. Most pros do a spring and a fall tune-up.
- A pro tune-up runs $100–$200, and Duke Energy credits about $50 toward one. Georgia Power and Dominion run their own efficiency programs.
- Keep 18–24 inches clear around the outdoor unit. Pollen, grass clippings, and leaves against the coil quietly kill efficiency.
Why a heat pump needs more attention than a plain AC
A furnace-and-AC setup gets to rest half the year. Your heat pump does not. It cools from May into late September, then flips around and heats through winter, so the same compressor and coils work nearly every month. More runtime means more wear. It also means a small problem you shrug off in July is still there, quietly getting worse, in January.
That's the case for staying ahead of it. None of the work is hard. Most of it you can do yourself in about the time it takes to drink a coffee.
The filter: check it monthly, no exceptions
If you do one thing off this whole page, do this. A dirty filter starves the system of airflow, makes the compressor strain, pushes your bill up, and stands as the single most common reason a heat pump fails before its time. I once watched a tech pull a filter so packed with pollen it looked like a gray brick. That system was three service calls from a dead compressor.
The routine is simple. Pull the filter once a month and hold it up to a light. See through it? Put it back. Can't? Swap it. A basic pleated filter runs $10 to $25. During the spring pollen wave and the hottest weeks of summer, when the system never rests, you might change it monthly. In a mild stretch, every three months is plenty.
Skip the high-MERV filters unless someone in the house has real allergies. They restrict airflow, and on a heat pump that airflow is everything.
Come late March the Piedmont turns yellow, and every bit of that pine pollen is hunting for a surface to cling to. The outdoor coil on your heat pump is a perfect trap. Pollen mats down between the thin fins, chokes the airflow across the coil, and the system loses efficiency right as you switch over to cooling. A five-minute rinse with a garden hose in April, top to bottom on gentle pressure, clears most of it. Run the hose again after the heavy pollen weeks.
Keep the outdoor unit breathing
The outdoor unit has to move air to dump or gather heat, so it needs room. Aim for at least 18 to 24 inches of clearance on every side and about five feet of open space above it.
- Cut the shrubs back. Those foundation bushes that looked tidy in spring will crowd the unit by August.
- Clear the top and sides of leaves, grass clippings, and blown-in seed pods.
- Check that it sits level on its pad. Our red clay shifts after a wet season, and a tilted unit strains the compressor and the refrigerant lines.
- In winter, keep it free of drifted leaves and ice so the defrost cycle can work.
Cut the power at the disconnect or the breaker before you get your hands near the fan. Every time.
You can rinse the outdoor coil yourself with a hose and a can of coil cleaner from the hardware store. Go gentle. The fins are thin aluminum and bend if you lean on them. The indoor evaporator coil is another matter. It sits up inside the air handler, it's awkward to reach, and it's easy to wreck. Leave that one for the yearly tune-up. Reaching it is a chunk of what you pay the tech for.
When to stop and call a pro
DIY covers the filter, the clearance, and a gentle coil rinse. Past that, some jobs need a licensed tech with gauges. Call one if you see:
- Ice on the outdoor unit that will not melt after a defrost cycle, or any ice at all in summer.
- Weak airflow, or air that is not warm in heat mode or cold in cool mode, after you have already checked the filter.
- The system runs nonstop and never reaches the thermostat setting.
- Grinding, screeching, or a sharp electrical smell. Shut it off and call.
- The backup heat strips run constantly, which usually points to a refrigerant or a settings problem.
Refrigerant work in particular is not a DIY job. It takes a licensed tech by law, and a low-refrigerant reading almost always means a leak that has to be found, not just topped off. If the unit is old and the repairs keep stacking up, our repair-vs-replace guide helps you decide whether to keep sinking money into it.
What a tune-up costs, and who helps pay for it
A professional tune-up is cheap next to a new compressor. Rough 2026 numbers for our region, plus the utility help that trims them.
| Item | Typical 2026 cost | Notes |
|---|---|---|
| Single pro tune-up | $100–$200 | Coils, refrigerant, electrical, drain line |
| Annual maintenance plan | $150–$300 / year | Usually two visits, spring and fall |
| Duke Energy tune-up credit | about $50 back | Charlotte, the Triangle, Upstate SC |
| Georgia Power efficiency programs | Varies | Metro Atlanta and most of Georgia |
| Dominion Energy programs | Varies | Columbia and the Midlands |
Get the utility right for your address before you chase a rebate. Duke covers Greenville and the Upstate, Dominion covers Columbia and the Midlands, and swapping them is how people leave money behind.
One small job saves a big headache: the condensate drain line. In our humidity it clogs with algae and slime, backs up, and either trips the system off or spills water into the air handler and down onto your ceiling. Once a season, pour a cup of distilled white vinegar into the drain line access to keep it clear. A tech does this at every tune-up, but between visits it's a two-minute chore worth doing yourself.
