Heat Pump Repair in Atlanta

Why Atlanta runs on heat pumps

A heat pump is an air conditioner that can run backwards: in summer it moves heat out of the house, in winter it moves heat in. Atlanta's climate — hot humid summers, winters that spend most nights above 25°F — sits squarely in the efficiency sweet spot, which is why heat pumps dominate the 1980s–2000s subdivisions across Gwinnett, Cobb and North Fulton and nearly all all-electric homes. The tradeoff is runtime: a heat pump works nearly twelve months a year, accumulating roughly double the annual hours of a cooling-only AC. Parts wear on a faster clock, and the failures cluster around the components that make the system reversible.

The failures specific to heat pumps

• Reversing valve ($650–$1,800). The valve that switches the system between heating and cooling. When it sticks, the system heats when it should cool or vice versa — or does neither well. Replacement requires opening the refrigerant circuit, which is why the price is high.
• Defrost control board ($300–$850). In Atlanta's damp cold the outdoor coil frosts; the defrost board decides when to melt it. A failed board leaves the outdoor unit encased in ice, airflow blocked, capacity gone.
• Auxiliary heat staging. Electric heat strips should engage only in the coldest weather or during defrost. A misconfigured thermostat or failed outdoor sensor leaves them running constantly — the classic "my power bill doubled" call.
• Defrost sensors and thermostats. Cheap parts that cause expensive-looking symptoms: ice that never clears, or defrost cycles that fire every twenty minutes.

Everything a standard AC fails on, a heat pump fails on too — capacitors, contactors, fan motors, refrigerant leaks, and eventually the compressor — just on roughly double the annual runtime.

Symptoms: what your heat pump is telling you

• Ice casing the outdoor unit in winter that never melts — defrost failure
• Lukewarm air in heating mode with the thermostat never satisfied — low refrigerant or weak compressor
• AUX HEAT on the thermostat display for days in ordinary winter weather — heat pump side not carrying the load
• System stuck in one mode after a power outage or thunderstorm — reversing valve solenoid or board
• Loud clanging when the mode switches — reversing valve hammering, worth a call before it sticks for good
• Steam and a whoosh every hour or so in cold weather — normal defrost, not a fault

Auxiliary heat: the most misunderstood line on your bill

Every Atlanta heat pump carries electric resistance backup — the "aux" or "emergency" heat. Heat pumps lose capacity as outdoor temperature drops, so below the balance point (typically the low 30s here) the strips assist. Used correctly, aux heat runs a few hours on the coldest mornings. Used wrong — a thermostat in EM HEAT, a failed outdoor sensor, a heat pump too weak to carry the house — it runs all day at two to three times the cost of the compressor. If your Georgia Power bill jumped in a mild winter month, the heat pump side of your system is the first place to look. The fix is often a sensor, a refrigerant charge correction or a thermostat setting — not a new system.

How we diagnose a heat pump

1. Mode test. Command heating and cooling from the thermostat and watch the reversing valve respond — the fastest way to isolate a stuck valve from a control problem.
2. Refrigerant and airflow. Pressures and temperature split in both modes; heat pumps are far less tolerant of low charge in heating mode than in cooling.
3. Defrost function. Board inputs, coil sensor readings and a forced defrost cycle to prove the circuit works end to end.
4. Aux heat staging. Thermostat configuration and outdoor temperature sensor checked so the strips engage when they should — and only then.

Repair or replace a heat pump?

The decision framework is the same as any HVAC system — the $5,000 rule, refrigerant type, warranty status — with one heat-pump-specific consideration: efficiency gains are large. A 12–15 year old 10–13 SEER heat pump replaced with a modern high-efficiency unit cuts both heating and cooling costs, and in a climate where the system runs nearly year-round, those savings accumulate every month rather than one season a year. Qualifying high-efficiency heat pumps may also earn federal tax credits and Georgia Power rebates; program terms change, so verify current amounts before counting them in the math.

Heat pump stuck, iced over, or running up the power bill? Call +1 (229) 215-6071 — diagnosis first, written price before work.