Heat Pump Repair
Diagnosis and repair for heat pumps that will not heat, will not cool, ice up, trip breakers or show inverter fault codes.
Learn moreHeat Pumps & Ductless in Pasadena, CA
Heat pump maintenance in Pasadena that checks both the heating and cooling sides
A two-mode tune-up for Pasadena heat pumps: coil cleaning, electrical tests, defrost checks, drain flushing and a clear report on condition.
- Answering 24/7
- Price quoted before work
- Pasadena and nearby cities
Quick answer
A heat pump in Pasadena does more work than a furnace or an AC alone because it runs nearly all year. Maintenance once a year, ideally in spring before the heat arrives, catches weak capacitors, dirty coils, clogged drains and slow leaks before they cause a breakdown. Marco's tests the system in both heating and cooling modes and gives you a plain report. Call (626) 879-0711.
Heat Pump Maintenance
What heat pump maintenance covers at your home
A gas furnace in Pasadena might run a few hundred hours a year. A heat pump in the same house can run well over a thousand, because it handles the cooling all summer and the heating all winter. That means more wear on the compressor, the fan motors, the capacitors and the contactor, and more dust pulled through the coils. Annual maintenance is how you keep those hours from turning into a no cool call on the first 100 degree weekend.
Marco's Heating & Air maintains ducted heat pumps, packaged units and inverter systems across Pasadena and the San Gabriel Valley. Our tune-up is built around the parts that actually fail on heat pumps in this climate. We clean what needs cleaning, test what needs testing, run the system both ways, and tell you what we found without padding the list. If something needs repair, you get the price before we do anything.
Warning signs
Signs your heat pump is overdue for maintenance
Outdoor coil looks matted
Cottonwood fluff, leaves, dust and smoke residue form a gray mat on the coil fins. That blanket forces the compressor to run hotter in summer and freeze more easily in winter.
Longer run times
If the system runs much longer to reach the same setpoint as last year, dirty coils, a clogged filter, weak capacitor or low refrigerant charge are common reasons.
Water near the air handler
Heat pumps make condensate in cooling mode. A slow drain line, a full drain pan or a stuck float switch can leave water in a closet, attic or garage.
New humming or buzzing
A steady buzz from the outdoor unit often means a weak capacitor or a contactor with pitted points. Both are cheap to replace during maintenance and expensive to ignore.
No service in two years
Even a system that seems fine slowly loses efficiency as coils load up and parts drift. Two years without service is long for equipment running year round.
After a smoke season
Wildfire smoke and ash coat coils and filters fast. After a heavy smoke stretch, a cleaning and filter change protect the system and the air inside the house.
What a Marco's heat pump tune-up includes
Every visit covers the outdoor unit, the indoor air handler, the controls and the drainage. We do not hand you a long checklist of things that were merely looked at. The list below is the actual work, and we note readings on the report so next year's visit can compare against them.
- Rinse the outdoor coil from the inside out and straighten bent fins
- Test run capacitor microfarads against the rating and check the contactor points
- Measure compressor and fan motor amps and compare them to the nameplate
- Check refrigerant performance with temperatures and pressures, without opening the system unless needed
- Flush the condensate line, check the pan and test any float switch or condensate pump
- Run cooling and heating, watch the reversing valve shift, and check defrost operation
Why the defrost check still matters in Pasadena
Pasadena winters are mild, so it is tempting to skip the heating side of maintenance. The catch is that defrost parts get very little use here and can fail quietly. The defrost board reads a sensor clamped to the outdoor coil. When the coil gets cold enough and enough run time has passed, the board flips the reversing valve to send warm refrigerant outside and melt any ice.
If that sensor slips off the pipe or the board fails, nothing happens until a cold, damp night in the 30s, and then the coil ices solid and the house cools down. During maintenance we check sensor mounting and resistance and, on boards that allow it, force a short defrost test so you know the controls work before you need them.
Inverter heat pumps and filters need specific attention
Variable speed inverter systems are very efficient, but their electronics dislike heat and dust. We check that the outdoor board compartment is clean and dry, look for signs of insect nests or rodent damage, and read any stored fault codes. A board that has logged repeated high pressure or high temperature trips is telling you something about airflow or charge, even if the house feels fine.
Filters matter more on a heat pump than on a furnace because the system moves air most days of the year. In Pasadena's dusty months, a one inch filter may need changing every one to two months. We check the filter size, the fit of the filter slot, and whether a deeper media cabinet would cut how often you have to think about it.
Step by step
What happens during the tune-up
- 1
Check the history
We ask how the system has behaved, review any past repairs, and note the age and model so the inspection focuses on the parts most likely to fail on that unit.
- 2
Shut down and clean
Power is shut off at the disconnect, the outdoor coil is rinsed, debris is cleared from the base pan, and the condensate line is flushed at the indoor unit.
- 3
Electrical testing
Capacitors, contactor, wiring connections, fan motors and compressor amps get measured. Loose or heat damaged wiring is tightened or flagged for repair before it causes trouble.
- 4
Run both modes
The system runs in cooling and heating while we measure temperature split, watch pressures where needed, confirm the reversing valve shift and test defrost if the board supports it.
- 5
Report and advice
You get a plain report with readings, what is healthy, what is wearing, and any repair price. Nothing is replaced without your approval first.
Typical prices
What heat pump maintenance costs in Pasadena
These are typical 2026 ranges for heat pump maintenance in Pasadena and nearby cities. A single system in an easy to reach location costs less than a rooftop unit or a home with two systems. We quote the price before we start the work.
| Job | Typical range | What is included |
|---|---|---|
| Annual heat pump tune-up, one system | $139 to $239 | Both modes tested, coil rinse, electrical checks, drain flush and written report |
| Second system at the same home | $97 to $167 | Added when two systems or a ducted system plus mini-split are serviced together |
| Deep coil chemical cleaning | $187 to $389 | Recommended after smoke seasons or for coils that rinsing alone cannot clear |
| Capacitor replacement found during tune-up | $163 to $337 | Only done when the reading is out of range and you approve it |
Price moves with access (rooftop, attic or tight side yard), the number of systems, how dirty the coils are, and whether condensate pumps or float switches need replacing. Members of a maintenance plan pay less per visit. Compare other jobs in our Pasadena HVAC price guide.
Heat pump maintenance in Pasadena homes
Spring is the best time for heat pump maintenance here. A tune-up in March or April catches the weak capacitor or dirty coil before the first heat wave, when every HVAC company in the valley is booked and parts get scarce. If you skip spring, late fall works for the heating side, but the cooling season is where Pasadena systems take the most wear, so that is where the attention pays off.
Location adds its own maintenance needs. Homes near the Arroyo Seco and up in the foothills collect more leaves, pine needles and wildlife around outdoor units. Homes under jacaranda, sycamore and oak trees fight a steady drop of debris into the top of the condenser. Since the Eaton Fire, many Altadena and east Pasadena systems have needed extra coil cleaning and filter attention to deal with lingering ash and soot, and we handle that work carefully and without rushing homeowners.
Related work
Often booked with heat pump maintenance
HVAC Maintenance Plans
Two visits a year, cooling in spring and heating in fall, so small problems get caught before a heat wave or a cold night.
Learn moreDuctless Mini-Split Repair
Repairs for dripping indoor heads, blinking error codes, dead zones, noisy fans and mini-splits that blow air but do not cool.
Learn moreAir Duct Cleaning
Camera inspection first, then negative-pressure HEPA cleaning of supply, return, blower and coil when your ducts actually need it.
Learn moreWhere we do heat pump maintenance
Our technicians handle this work all over Pasadena and the surrounding San Gabriel Valley. A few of the places we cover:
Questions
Heat Pump Maintenance questions from Pasadena homeowners
Once a year is right for most homes, best done in spring before the cooling season. Because a heat pump runs for both heating and cooling, it collects more hours than a furnace or an AC alone. Homes near heavy trees, busy streets, or areas affected by wildfire smoke may benefit from a second coil cleaning in late summer or fall.
You can gently hose off loose debris with the power off at the disconnect, spraying from the inside out if you can reach. Avoid pressure washers, which fold the thin fins. Clearing leaves from the top and base is helpful between visits. Electrical testing, refrigerant checks and defrost testing should be left to a technician with the right meters.
Maintenance includes checking refrigerant performance through temperatures and, when needed, pressures. It does not include adding refrigerant, because a system that is low has a leak somewhere. If we find signs of low charge, we explain the options, which may include leak detection, a repair and recharge, or a comparison against replacement on older units.
Many manufacturers expect the equipment to be maintained according to the owner's manual, and some warranty claims ask about service history. Keeping the yearly reports we leave you is a simple way to show the system has been cared for. Registration with the manufacturer after installation is also important, since some extended parts coverage depends on it.
Yes, and it is cheaper to do them together. Ductless mini-splits are heat pumps too, and their indoor heads collect dust and grow slime in the blower wheel and drain pan. We clean the filters, check the drain, rinse the outdoor unit and test both modes. Ask when you call (626) 879-0711 so we bring the right cleaning kit.
Need heat or cooling back today?
Call our Pasadena line any hour. A person answers, asks a few questions about the system, and gives you an arrival window.
(626) 879-0711Answering 24 hours, 7 days