Heat Pump Repair & Service in Baltimore, MD

Heat Pump Repair Across the Greater Baltimore Metro

Heat pumps run in both seasons, so they accumulate roughly twice the runtime of a cooling-only system and they fail in ways a furnace never does. They also get blamed for problems that are actually settings — a winter electric bill caused by auxiliary heat staging is a configuration issue, not a broken compressor, and we would rather correct the setting than sell you a part.

We repair heat pumps across Baltimore City and Baltimore, Anne Arundel, Harford, and Howard counties, with flat-rate pricing quoted before work begins. Request service.

What the symptoms usually mean

Not enough heat on cold days

The most common heat pump complaint, and often not a fault at all. Check whether the system is running in emergency or auxiliary heat — many thermostats display this. If auxiliary heat is engaging at 45°F, the balance point is set wrong. If it is engaging at 20°F, that may be entirely correct. Genuine faults here are low refrigerant charge, a failing reversing valve, or a compressor losing capacity.

Running constantly in winter

Long runtimes are normal for a heat pump — that is how they work, and a variable-speed unit is designed to modulate rather than cycle. What is not normal is running continuously while losing ground on setpoint.

Ice on the outdoor unit that never clears

Frost forming and then melting during a defrost cycle is designed behaviour. Ice that builds and stays, or a unit encased in ice around the base, is not — usually a failed defrost sensor or control board, a drainage problem beneath the unit, or low charge. Worth a call rather than waiting it out.

Blowing cool air in heating mode

Heat pump supply air is cooler than furnace air by design — roughly 90–105°F rather than 120–140°F. If it is genuinely cool rather than merely cooler, suspect a reversing valve stuck in cooling, low charge, or a defrost cycle in progress.

The system will not switch between heating and cooling

Classic reversing valve or its solenoid, sometimes a thermostat wiring or configuration fault.

Winter electric bills far above expectation

Almost always auxiliary resistance heat running more than it should. That traces to balance-point configuration, a defrost problem causing excessive strip use, low charge reducing capacity, or a thermostat set to emergency heat and forgotten. This is one of the highest-value things we check.

What we do on a heat pump call

We verify operation in both modes, check reversing-valve function, measure refrigerant pressures and temperatures, test defrost initiation and termination, measure airflow, and — critically — review the thermostat's balance point and auxiliary staging configuration against your actual equipment. Many heat pump complaints are resolved in the control settings, and we will tell you when that is the case.

You get the readings, an explanation in plain language, and a flat-rate quote before any work starts.

Local factors

Waterfront properties — Middle River, Essex, Joppatowne, the Magothy and Severn shorelines, the Pasadena peninsula — run outdoor units in brackish air year-round, and corrosion on coils, cabinets, and electrical terminals shows up meaningfully earlier than inland. All-electric neighbourhoods such as the 1990s Abingdon and Nottingham developments are reaching the age where original heat pumps lean heavily on strip heat; on those, a configuration review is worth doing before any parts conversation.

When repair stops making sense

A failed compressor on an older system, a system using R-22 (no longer produced), or a pattern of significant repairs inside two years all shift the arithmetic. Cold-climate replacements hold far more capacity at low temperature than the units they replace, so the gain is often larger than the efficiency rating alone suggests. Our repair-or-replace framework covers the math, and heat pump installation covers what replacement involves.

Preventing the next call

Because heat pumps run year-round, they need both a heating and a cooling visit — and defrost behaviour and auxiliary staging should be verified each autumn. See heating maintenance and AC tune-ups, or the Green Guardian Club which schedules both.

Related services

Considering an upgrade, see cold-climate heat pumps. Curious how the technology actually works, our explainer on how a heat pump works covers defrost, balance point, and auxiliary heat in plain language.