Fast, Honest, Done Right

Heat Pump Repair in Gilbert, Mesa & the East Valley

If your heat pump is blowing lukewarm air, stuck in one mode, icing over, or running nonstop, Octane Air can diagnose and repair it — often the same day. Our shop is at 7931 E Pecos Rd in southeast Mesa, a few minutes from Gilbert, Queen Creek, and San Tan Valley, so we can get to most East Valley homes quickly.

Octane was founded by John Kubacki, who has 27 years in Arizona HVAC and previously built Duke's of Air. Our technicians are licensed (ROC #362427), test the system in both heating and cooling mode, and give you a clear price before any work starts. No upselling, no guesswork.

Need help now? Call 480-690-4411 or request heat pump service online.

Why Heat Pumps Wear Out Faster in Arizona

In most of the country a heat pump works hard for a few months a year. In the East Valley it works nearly all year: cooling through 110°F+ summers, then heating on cold winter mornings. That extra run time is why heat pumps here often need repair or replacement sooner than the same equipment in milder climates.

• Extreme summer load. Capacitors, contactors, and fan motors fail most often in July and August, when the outdoor unit runs for hours in direct sun.
• Season changes. The reversing valve switches the system between heating and cooling. A valve or solenoid that sat unused all summer can stick when the first cold night arrives.
• Dust and monsoon debris. Dirt packed into the outdoor coil makes the compressor work harder and run hotter.
• Defrost cycles. On winter mornings in the 30s and 40s the unit has to defrost itself. A bad sensor or defrost board can leave the coil iced over.

Common Heat Pump Problems We Repair

These are the problems East Valley homeowners call us about most, with the usual causes behind them.

• Stuck in cooling or heating mode: usually a failed reversing valve solenoid, a sticking reversing valve, or a thermostat wiring or setup issue.
• Blowing lukewarm or cold air in heat mode: often low refrigerant from a leak, a reversing valve that isn't fully shifting, or a compressor problem.
• Outdoor unit hums but won't start: a weak or failed capacitor or a burned contactor, both very common in Arizona heat.
• Ice that doesn't clear from the outdoor coil: defrost control or sensor failure, low refrigerant, or an outdoor fan motor that has stopped.
• Runs constantly or short-cycles: restricted airflow, dirty coils, a refrigerant leak, a failing thermostat, or a system that was sized wrong.
• Energy bills spike in winter: the backup electric heat strips (the "AUX" or "EM heat" light on your thermostat) are carrying the load because the heat pump itself isn't.
• Grinding, buzzing, or clicking: motor bearings, a loose fan blade, or electrical components starting to fail.
• Water leaking indoors: a clogged condensate drain line or a frozen indoor coil.

What Happens During a Heat Pump Repair Visit

1. Arrival in a clear window. You'll know when to expect us.
2. Test both modes. We run the system in heating and cooling, because many heat pump faults only show up in one of them.
3. Find the root cause. We check electrical components, refrigerant pressures and temperatures, airflow, the defrost controls, and the thermostat.
4. Explain your options and price. You get a plain-English explanation and the cost before we start. If a repair doesn't make financial sense on an older system, we'll tell you that too.
5. Repair and verify. After the repair we run the system again to confirm it's heating and cooling properly.

Members of our Octane Premier maintenance plans get discounted diagnostics and 10–20% off parts and services.

What Affects Heat Pump Repair Cost?

The price depends on which part failed, what refrigerant your system uses, and how accessible the equipment is. Roughly, repairs fall into three levels:

• Minor repairs: capacitors, contactors, thermostat problems, and clogged drain lines. These are the most common fixes and usually the least expensive.
• Mid-range repairs: outdoor fan motors, defrost boards and sensors, reversing valve solenoids, and finding and fixing refrigerant leaks.
• Major repairs: compressors, reversing valves, and coils. At this level it's worth comparing the repair cost against replacement, especially on older systems.

Refrigerant type matters too. Systems that use R-22 are expensive to recharge because that refrigerant is no longer produced. R-410A systems can still be repaired and recharged as normal.

Should You Repair or Replace Your Heat Pump?

Repair is usually the right choice for a newer system with a single failed part. Replacement starts to make more sense when:

• The heat pump is 10–12 years old or older. Year-round use in Arizona shortens lifespan.
• The compressor or reversing valve has failed and the unit is out of warranty.
• It still uses R-22 refrigerant.
• You've paid for several repairs in the last two years.
• Your bills keep rising or some rooms never get comfortable.

A common rule of thumb: multiply the system's age by the repair cost. If the result is over $5,000, get a replacement quote before you repair. We offer free estimates and free second opinions, and we'll show you both numbers side by side. Learn more about heat pump installation and replacement.

Is It a Heat Pump or an AC and Furnace?

Many East Valley homes have heat pumps and the owners don't know it. You probably have a heat pump if:

• The outdoor unit runs in winter when the heat is on.
• Your thermostat has an "AUX heat" or "EM heat" setting.
• You don't have a gas furnace. Many Arizona homes are all-electric.
• The outdoor unit's label or model number says "heat pump."

Not sure? Tell us when you call and we'll confirm it on arrival. If you have a gas furnace instead, see our heating repair service.

How to Prevent the Next Heat Pump Breakdown

• Tune it up twice a year, in spring before cooling season and in fall before heating season, because a heat pump works in both. Our AC tune-up and heating maintenance visits cover both halves.
• Change filters every 1–3 months. Change them more often during dust storm season or if you have pets.
• Keep 2 feet of clearance around the outdoor unit and gently rinse the coil after monsoon dust storms.
• Don't ignore the AUX light. If backup heat runs all the time in mild weather, something is wrong, and it's costing you money.

Heat Pump Service Areas

We repair heat pumps throughout the East Valley, including:

• Mesa: our shop is on E Pecos Rd in southeast Mesa
• Gilbert
• Chandler
• Queen Creek
• San Tan Valley
• Apache Junction
• Tempe and Scottsdale

Heat Pump Repair FAQs

Why is my heat pump blowing cold air when the heat is on?

First, check that the thermostat is set to "heat" and the outdoor unit is running. If it's in a defrost cycle, cool air for a few minutes is normal. If it continues, the usual causes are a stuck reversing valve, low refrigerant from a leak, or a failed outdoor component, and all of these need a technician.

Is steam coming from my outdoor unit normal?

Usually, yes. On cold mornings the heat pump runs a defrost cycle to melt frost off the outdoor coil, and that melting frost can look like steam. It's a problem when the coil stays covered in ice, or the unit defrosts so often that the house can't stay warm.

What do "AUX heat" and "EM heat" mean on my thermostat?

AUX (auxiliary) heat is the backup electric heat that helps the heat pump on cold mornings or when you raise the temperature a lot at once. EM (emergency) heat runs only that backup heat and shuts the heat pump off. Both are expensive to run, so if AUX is on all the time in mild weather, schedule a repair.

How long do heat pumps last in Arizona?

Many last about 10–15 years here. They run far more hours per year than heat pumps in cooler climates, so twice-a-year maintenance makes a real difference to how long yours lasts.

Can my R-410A heat pump still be repaired?

Yes. Since 2025, new systems have been moving to lower-GWP refrigerants such as R-454B and R-32, but existing R-410A systems can still be serviced, repaired, and recharged.

Do you offer same-day heat pump repair?

Same-day service is often available, especially for calls that come in early in the day. Call 480-690-4411 and we'll give you the soonest arrival window.

Ready to get your heat pump working again? Request heat pump repair or call 480-690-4411.