A heat pump runs year-round, cooling most months and heating the rest, so maintenance matters more here than on a furnace-and-AC setup that each rest half the year. Change the filter monthly, keep the outdoor unit clear of debris, and schedule a technician visit twice a year, ideally before your heaviest season starts.

Why heat pump maintenance is different

A furnace sits idle all summer. An AC sits idle all winter. Each gets a break that lets small problems wait until the next service visit. A heat pump doesn't get that break. The same compressor, the same capacitors, the same outdoor coil handle both jobs, which means every part logs more run hours per year than its furnace-plus-AC equivalent. Skipping a maintenance visit on a heat pump doesn't just risk one season's comfort. It compounds wear on components that never really stop working.

What a homeowner can check

A few tasks are simple, safe, and worth doing on a regular schedule.

Change or clean the air filter monthly during heavy use, more often if you have pets or live near a dusty area. A clogged filter restricts airflow, which makes the whole system work harder and can ice up an indoor coil over time.

Clear a two-foot buffer around the outdoor unit. Grass clippings, leaves, mesquite pods, and blown dust all reduce the airflow the outdoor coil depends on to do its job. In Arizona specifically, monsoon dust settles into the coil fins between storms, so a quick visual check after a dust event is worth the two minutes it takes.

Rinse the outdoor coil gently with a garden hose when you see visible dust buildup on the fins. Point the hose from the inside out if you can access it that way, and never use a pressure washer, which bends the thin aluminum fins and makes airflow worse, not better.

Keep vegetation and sprinkler spray away from the unit. Sprinkler heads that mist the cabinet daily accelerate corrosion on the coil and cabinet over years.

Check that the condensate drain isn't visibly backed up if your system has an accessible cleanout. A slow drip or standing water near the indoor unit is worth investigating before it trips the safety float switch and shuts the system down.

What a technician should do annually

Some maintenance tasks require tools, gauges, and training a homeowner doesn't have, and they're worth paying for even on a system that seems to be running fine.

A full refrigerant charge check confirms the system has the right amount of refrigerant, since both low and high charge reduce efficiency and can damage the compressor over time. A technician also tests capacitor readings against their rated values, since a capacitor can be weakening well before it fails outright and takes the compressor with it. Cleaning the coil more thoroughly than a garden hose can reach is standard, along with checking electrical connections for corrosion or looseness that builds up from constant cycling.

On a heat pump specifically, a technician should verify the reversing valve switches cleanly between heating and cooling modes, and confirm the defrost control is triggering and clearing correctly. These two components don't exist on a plain AC, and they're easy for a generalist maintenance checklist to skip if the tech isn't thinking heat-pump-specific.

The Arizona twist: prioritize the pre-summer visit

Most national maintenance advice tells you to schedule a fall tune-up ahead of heating season and a spring tune-up ahead of cooling season, treating both as roughly equal in importance. That advice doesn't fit Arizona well. Cooling season here runs from roughly May through October, brutal and long, while heating season is short and mild by comparison. A heat pump that limps through a cool December morning on a slightly weak charge is an inconvenience. The same weak charge on a system running flat out against 115°F in July is a real risk, both to your comfort and to the compressor itself.

If you can only manage one maintenance visit a year, make it the pre-summer one, scheduled in March or April before the demand crunch hits and before technicians get booked solid. The fall visit still has value, mainly for the reversing valve and defrost checks, but it's the lower-priority of the two in a climate like this one.

What skipping maintenance actually costs

A neglected heat pump doesn't usually fail all at once. It fails gradually, running less efficiently, cycling more often, and putting more strain on the compressor, until a small problem becomes a $500 to $1,200 repair instead of a $150 tune-up catching it early. The math rarely favors skipping service. For the fuller breakdown of what repairs actually cost when maintenance gets skipped, see our heat pump repair guide.

The Department of Energy publishes general guidance on heating and cooling equipment upkeep, including filter and airflow basics, at energy.gov.

Common questions

How often should a heat pump get professional maintenance?

Twice a year is standard: once before your heaviest cooling season and once before heating season. In Arizona, prioritize the pre-summer visit since cooling season is longer and harder on the system than the shorter, milder winter. If you can only afford one visit, make it that one.

Can I clean my own outdoor unit, or does that need a technician?

You can safely clear debris and rinse visible dust off the coil fins with a garden hose. Never use a pressure washer, which bends the fins. A deeper coil cleaning, refrigerant check, and electrical inspection should go to a licensed technician with the right tools and training.

What's different about maintaining a heat pump versus a furnace and AC?

A heat pump runs nearly year-round instead of resting half the year like a furnace or AC does separately. That means more total run hours on the same compressor and coil, plus two components a plain AC doesn't have: the reversing valve and the defrost control, both worth checking during a tune-up.

Does skipping a maintenance visit actually save money?

Rarely. A skipped visit tends to shift cost from a $150 tune-up to a $500-$1,200 repair once a weakening part fails outright, often during the worst possible week of summer heat. Regular maintenance catches a capacitor or refrigerant issue while it's still cheap to fix.

Get a maintenance visit scheduled

If it's been more than a year since a technician looked at your heat pump, use the quote form below to compare licensed contractors near you, including Gilbert and Chandler. For a broader look at what a full tune-up should include across any AC or heat pump system, see our AC maintenance checklist and HVAC tune-up cost guides.