Heat Pump Repair
Heat pump repair for Valley homes — cooling, heating, defrost, and the reversing valve nobody else checks.
Call Now: (602) 905-4528A heat pump is an air conditioner that can run backwards, and that one extra capability adds a whole set of failures a straight AC does not have: a reversing valve that can stick, a defrost board and sensor that can misread, auxiliary heat strips and sequencers that can fail silently, and a bi-directional refrigerant circuit with check valves at both ends. Diagnosing one properly means testing the mode you are not currently in.
In the Phoenix Metro heat pumps are extremely common, and for good reason: our heating season is short and mild, which is exactly where a heat pump is most efficient. But it also means the heating side runs a few hundred hours a year, so heating faults sit undiscovered from March until the first cold morning in December — the same pattern that catches furnaces out.
Fast Track Heating and Cooling repairs all heat pump brands and configurations, including package units, split systems, and ductless mini splits. We're a Mesa-based family business, licensed and insured under Arizona ROC #355929. Call (602) 905-4528.
What's Included
Heat pump failures that are not AC failures
A stuck reversing valve is the signature heat pump fault: the system cools when it should heat, heats when it should cool, or gets stuck between positions with poor performance in both modes. It can be a failed solenoid coil, a valve stuck mechanically, or a control signal that never arrives — and telling those apart takes measurement, because the symptom is identical.
Defrost problems are the second category. In Valley conditions true frost is uncommon, but a failed defrost thermostat or board can trigger unnecessary defrost cycles that dump heat you paid for, or fail to trigger one on a rare cold damp morning. Auxiliary heat is the third: strips, sequencers, and relays that only run in winter, and a failed strip means lukewarm air on the coldest morning of the year while the equipment appears to be working.
Plus everything a normal AC can do
Heat pumps still fail the ordinary ways: run capacitors, contactors, condenser fan motors, blower motors, refrigerant leaks, plugged condensate drains and tripped float switches, control boards, and thermostats. In a Phoenix summer those are the majority of the calls, and the diagnosis is the same set of readings — pressures, superheat and subcooling, temperature split, amp draw, static pressure.
What differs is interpretation. Charge diagnosis on a heat pump has to account for which mode it is in, and a system that measures fine in cooling can be short on charge in heating. That is why we test both modes when the complaint involves heating, even in July.
Getting the thermostat right
A surprising share of heat pump complaints are thermostat configuration rather than equipment. Heat pump thermostats need the correct equipment type set, an O/B reversing valve output configured for your manufacturer's convention, and sensible auxiliary heat staging and lockouts. Get the O/B setting backwards and the system heats when you ask for cooling.
Emergency heat is the other common misunderstanding. It bypasses the compressor and runs on strips alone, which is expensive — it is a fallback for a failed compressor, not a cold-morning shortcut. If your emergency heat is on because normal heat felt weak, something in the heat pump needs diagnosis rather than bypassing.
Heat pump repair vs. AC repair vs. furnace repair
This page covers systems where the outdoor unit provides both heating and cooling — the reversing valve, defrost circuit, and auxiliary heat are unique to it.
If your home has a gas furnace indoors and an AC condenser outdoors, AC repair and furnace repair are the right pages for the cooling and heating sides respectively.
Not sure which you have? If your thermostat has an Emergency Heat setting, or the outdoor unit runs in winter, it is a heat pump.
Heat pump repair costs
Flat-rate, written, approved before installation. Your diagnostic fee is applied to the repair.
| Job | Typical range |
|---|---|
| Common parts repairsCapacitor, contactor, float switch, drain clearing, thermostat, defrost sensor. | $150–$600 |
| Heat pump specific repairsReversing valve solenoid, defrost board, sequencers, heat strips, check valves. | $400–$1,500 |
| Mid to major repairsFan and blower motors, refrigerant leak repair, reversing valve replacement, compressor or coil. | $600–$3,500+ |
| System replacementWhole-system range for the Valley; quoted after assessment when the decision is close. | $5,800–$12,000 |
Typical residential ranges across the Phoenix metro — not a formal quote. Equipment age, refrigerant type, and access set the final price.
Heat pump repair mistakes
Being diagnosed by an AC-only technician
If nobody tested heating mode, nobody checked the reversing valve, the defrost circuit, or the auxiliary heat. Half the system went unexamined.
Leaving it on emergency heat
Emergency heat runs on electric strips alone and is expensive. Using it as a workaround hides the actual fault and shows up on the utility bill.
Assuming lukewarm air means a failure
Heat pump supply air is genuinely cooler than furnace air — often in the 85° to 100° range. That is normal operation, not a fault.
Topping off charge instead of finding the leak
Charge diagnosis differs by mode on a heat pump, and low charge always means a leak. Repeated top-offs mask a problem that gets worse.
How It Works
Schedule
Call or book online — we'll find a time that works for you.
Diagnose
Our certified technicians assess your system and explain the issue.
Approve
We provide an upfront quote so you know exactly what to expect.
Complete
We get the job done right the first time, guaranteed.
Serving the Entire Phoenix Metro
Heat pumps are a strong match for the Valley because our winters are mild — a heat pump loses efficiency as outdoor temperatures approach freezing, and Phoenix rarely spends long there. That is why so many Mesa, Gilbert, Chandler, and Queen Creek homes and nearly every ductless installation here use one.
The Arizona wrinkle is asymmetric runtime. The cooling side accumulates thousands of hours a year against 110°F-plus ambient, while the heating side runs a few hundred. So cooling components wear out and heating components fail from disuse — sticky reversing valves, corroded strip connections, defrost boards that have not been exercised since spring. A fall check finds those; summer service calls usually do not look for them.
We repair heat pumps in Mesa, Gilbert, Chandler, Tempe, Queen Creek, San Tan Valley, Apache Junction, Scottsdale, Paradise Valley, Fountain Hills, Ahwatukee, Phoenix, Glendale, Peoria, and Surprise.
Why Choose Fast Track?
Licensed & Insured
Fully licensed, bonded, and insured for your peace of mind.
Fast Response
Same-day service available with rapid response times across the Valley.
Quality Guaranteed
100% satisfaction guarantee on all work we perform.
Transparent Pricing
Upfront quotes with no hidden fees or surprise charges.
What Our Customers Say
Real reviews from real Phoenix Metro homeowners.
"I had Fast Track Heating and Cooling service our two AC units before the summer heat kicked in. They were prompt, professional and knowledgeable. I appreciate supporting a locally owned business that treats you like family."
— Sarah McNurlin
"Great service, very knowledgeable."
— Danny Court
"I called these guys in the late evening with what my mom described as a rogue AC unit. I could hear the AC grinding metal on metal in the background of our phone call. Fast Track was fast acting getting onsite within the hour and changing her blower motor and wheel. Fast and communicative describes these guys."
— Kc Degroff
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Don't wait — call now for fast, reliable heat pump repair service across the Arizona Valley.
(602) 905-4528Frequently Asked Questions
Serving These Cities
Local heat pump repair pages for the cities we serve most.
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