Heat Pump Repair in Dallas
Heat pump repair in Dallas: reversing valves, defrost boards, iced outdoor units, weak heating or cooling. Same-day appointments. Calls answered 7am–9pm daily.
Calls answered 7:00 AM – 9:00 PM CT, 7 days a week
Quick answer: A heat pump is an air conditioner that can run backward — the same compressor, coils and refrigerant, plus a reversing valve and defrost controls. Most repairs are standard AC repairs; the heat-pump-specific failures are the reversing valve, defrost board and coil sensors. Call +1 (254) 256-1680 — calls answered 7:00 AM – 9:00 PM CT, 7 days a week.
How a heat pump fails differently from an AC
In cooling mode, a heat pump is an air conditioner — same parts, same failures, same repair prices. The differences show up in heating season. The reversing valve redirects hot refrigerant indoors instead of outdoors; when its solenoid or slider sticks, you get a system that cools beautifully in January and will not heat at all. The defrost control periodically reverses the system in cold weather to melt ice off the outdoor coil; when it fails, the coil turns into a block of ice and heat output collapses. And because a heat pump runs year-round instead of seasonally, its capacitors, contactors and fan motors accumulate run hours roughly twice as fast as a straight AC's.
Signs your heat pump needs repair
- Cools fine but blows cool or lukewarm air in heat mode (reversing valve suspect)
- Outdoor unit encased in ice for more than an hour at a time (defrost failure)
- Steam or water vapor off the outdoor unit every 30–90 minutes in cold weather — that is normal defrost; constant defrost is not
- Electric bill spikes in winter with the same thermostat setting (strip heat carrying a dead outdoor unit)
- Short cycling in either mode
- Loud clunk or whoosh when modes change — the valve moving; if it bangs repeatedly, it is struggling
- Warm air in summer or any of the classic AC symptoms — see AC running but not cooling
What the technician checks
- Both modes. The system is run in cooling and heating; pressures and temperatures in each direction isolate whether the failure is in the shared circuit or the heat-pump-only parts.
- Reversing valve. Solenoid voltage, valve temperature pattern, and whether refrigerant actually changes direction when commanded.
- Defrost circuit. Board diagnostics, coil sensor resistance, and a forced defrost test.
- Shared electrical. Capacitor, contactor, fan motor — the same high-failure summer parts as any Dallas AC, plus the extra run hours a heat pump logs.
Heat pumps in the Dallas climate
DFW is close to ideal heat-pump territory: design cooling load is the dominant load, and winter design temperatures sit in the range where modern heat pumps still deliver useful heat. The honest caveats: during a hard freeze — the kind DFW gets every few years — a heat pump leans on its auxiliary strip heat, which is expensive to run, and defrost cycles will make the supply air feel cool for a few minutes at a time. That is normal operation, not a fault. A system that never comes out of defrost, or that ices over and stays iced, is the fault worth calling about.
What heat pump repair costs in Dallas
| Repair | Typical Dallas range | Note |
|---|---|---|
| Diagnostic / service call fee | $75–$200 | Often credited toward the repair |
| Capacitor replacement | $100–$400 | |
| Contactor replacement | $150–$400 | |
| Condenser fan motor replacement | $200–$700 | |
| Refrigerant leak detection | $150–$500 | |
| Reversing valve replacement (heat pump) | $600–$1500 | |
| Control board replacement | $300–$900 |
Ranges aggregated from HomeGuide, Angi, HomeAdvisor and Forbes Home cost guides plus Dallas–Fort Worth contractor pricing pages, collected October 2026.
Exact price only after diagnosis — call +1 (254) 256-1680. Full list on the Dallas AC repair cost page.
Frequently asked questions
Why is my heat pump not heating in winter?
The usual suspects in Dallas: a stuck reversing valve (the system cools fine but will not switch to heat), a failed defrost control board leaving the outdoor coil iced over, low refrigerant, or outdoor fan problems. A heat pump blowing cool air in heat mode can also be running auxiliary strip heat with the outdoor unit dead — your electric bill will tell that story. Call for diagnosis before the next freeze.
Why is my heat pump stuck in defrost mode?
Defrost should last a few minutes, a few times per cold day. If the outdoor unit stays iced over or defrost runs constantly, the defrost board, the outdoor coil sensor or the reversing valve is suspect. Sometimes the coil sensor simply got knocked out of its clip — but a genuinely stuck reversing valve needs a refrigerant-circuit repair, which is licensed-tech work.
Is heat pump repair different from AC repair?
Same refrigeration circuit, one critical difference: a heat pump has a reversing valve that flips refrigerant flow between heating and cooling, plus a defrost control that air conditioners do not have. Diagnosing a heat pump means testing both directions of operation. Everything else — capacitors, contactors, fan motors, refrigerant — is shared with straight AC repair.
Are heat pumps worth it in Dallas?
They fit DFW's climate well: long, hot summers where they cool as efficiently as a same-SEER2 air conditioner, and winters mild enough that the heat pump carries most of the load, with strip heat for the few hard freezes. The tradeoff is more moving parts — reversing valve and defrost controls are failure points a straight AC does not have.
How much does heat pump repair cost in Dallas?
Electrical repairs (capacitor, contactor, fan motor) cost the same as on an AC: $100–$700. The heat-pump-specific parts cost more: a reversing valve replacement runs $600–$1,500 because the refrigerant circuit must be opened, and defrost control boards run $300–$900. Full ranges: Dallas price guide.
Need AC repair today?
Call now and we will connect you with a licensed Dallas HVAC technician. Exact pricing is confirmed after on-site diagnosis — no surprises.