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Heat Pump Repair

Heat Pump Repair near you

Heat pump repair differs from air conditioner repair in one important way: the machine works all year, so a fault can show up as a house that will not cool in August or one that will not warm in January, and the same component can be responsible for both. A reversing valve that sticks, a defrost board that misreads its sensor, a low charge that barely shows in summer and cripples heating in winter — all of these announce themselves differently depending on the season they choose.

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Some heat pump behavior that worries homeowners is not a fault at all. Steam rising off the outdoor unit during a defrost cycle, air from the registers that feels cool against the skin though it is warming the house, and longer run times than a furnace ever needed are all normal. What is not normal is the backup resistance heat running constantly, and DOE warns specifically that leaning on those electric resistance elements is an expensive way to heat, which is why a mild fault can show up first as a startling electric bill.

On LokalMatch you describe the problem once, with your ZIP code and what the system is doing in which mode, and heat pump technicians covering your area get in touch. The pros pay for the requests they receive. LokalMatch does not perform repairs, does not set prices, and does not vet, rank or recommend anyone who responds, so checking the state license and the EPA Section 608 certification before work begins is still your responsibility.

Signs a heat pump needs service, in heating and in cooling

  • The auxiliary or emergency heat indicator stays lit in moderate weather instead of only during deep cold or defrost.
  • The electric bill jumps in winter without a matching cold spell, which usually means resistance heat is carrying the load.
  • The system heats but not cools, or cools but not heats, which points at the reversing valve or its control circuit.
  • The outdoor unit stays buried in ice, or the coil never clears between defrost cycles.
  • Defrost runs constantly, or never seems to run while frost keeps building.
  • Loud clunking, screeching or a compressor that hums and trips the breaker instead of starting.
  • Airflow at the registers has dropped, in either mode, or some rooms have stopped keeping up with the rest of the house.
  • The system was topped up with refrigerant in a previous season and performance has slipped again.

What commonly fails on a heat pump: reversing valve, defrost, charge and controls

A heat pump has all of an air conditioner's failure modes plus a set of its own, because it has to reverse and it has to defrost. That extra machinery is where a disproportionate number of winter calls originate, and it is also where guesswork is most expensive: replacing a reversing valve that was only being told the wrong thing by a failing sensor is a costly way to fix a control problem.

Charge problems deserve particular attention on a heat pump. A system slightly low on refrigerant may still cool acceptably in summer while losing a large share of its heating capacity in winter, at which point the resistance elements silently make up the difference and the fault reveals itself on the utility bill rather than on the thermostat. Because the circuit is sealed, a low charge means a leak, and EPA prohibits venting refrigerants and their HFC substitutes during service, so the correct response is to locate and repair the leak, recover properly and recharge by weight.

  • Reversing valve: a stuck or leaking valve, or a failed solenoid coil, leaving the system stuck in one mode.
  • Defrost control: a failed sensor, board or timer, so the outdoor coil either ices over or defrosts far more often than conditions warrant.
  • Refrigerant leak: often first visible as weak heating in winter rather than weak cooling in summer.
  • Auxiliary heat: failed resistance elements or their sequencers and contactors, which show up as no heat during defrost or during a cold snap.
  • Outdoor fan and motor: a failed fan motor stops heat exchange in both modes, though the compressor may keep running.
  • Controls and thermostat: a thermostat not configured for heat pump operation, which can call for resistance heat far more often than necessary.
  • Drainage at the outdoor unit: blocked base pan drainage that lets defrost water refreeze around the coil and fan.
  • Compressor: hard starting or an internal electrical fault, which is the point at which repair and replacement need comparing.

Winter behavior: defrost cycles, snow clearance and emergency heat

In cold weather the outdoor coil is the cold side of the system, so frost forms on it and the unit periodically reverses briefly to melt it. During that defrost the fan stops, steam often pours off the coil, and backup heat covers the house for a few minutes. It looks alarming and it is entirely normal. What is not normal is frost that never clears, ice encasing the fan, or defrost cycles running back to back.

Snow and meltwater are the seasonal chores that prevent service calls. Keep snow clear of the outdoor unit so air can reach the coil, make sure defrost water can drain away rather than pooling and refreezing under the unit, and keep the unit out of the path of snow sliding off a roof. Clearing ice by chipping at the coil with a tool is how fins get bent and refrigerant lines get punctured; if the unit is iced solid, shut it down and call a technician.

The emergency heat setting is widely misunderstood. It locks the system onto resistance heat and leaves the compressor idle, so it belongs to a genuine failure rather than a cold snap, and DOE cautions against using electric resistance heating excessively because of its inefficiency. If someone switched the thermostat to emergency heat weeks ago and left it there, that alone can explain a winter bill.

Repairing an older heat pump against replacing it

The arithmetic is different from a cooling-only system because a heat pump runs in both seasons and therefore accumulates wear faster. ENERGY STAR suggests having heating and cooling equipment evaluated by a professional once it is more than ten years old or when it stops keeping the house comfortable, which is a useful trigger for getting a considered opinion before a failure forces a rushed decision in bad weather.

Weigh three things together: the cost and likely durability of the repair, what the system does at low temperature, and where refrigerants stand. EPA confirms that installed R-410A equipment can keep being used and repaired throughout its useful life, so nothing forces a replacement. But an older unit that hands off to resistance heat early is expensive to run every winter, and current cold climate certified equipment must hold at least 70 percent of its 47-degree heating capacity down at 5 degrees Fahrenheit, which is a real difference in how often backup heat is needed at all.

If replacement is on the table, the same installation rules apply as for a new system: a fresh Manual J calculation rather than matching the old tonnage, a documented backup heat and changeover strategy, and duct work assessed before equipment is ordered, since ENERGY STAR notes improper installation can cut efficiency by up to 30 percent.

Certification and licensing for heat pump service work

Any technician opening your refrigerant circuit must hold EPA Section 608 certification, which is earned by passing an EPA-approved exam and never expires. Type II covers high-pressure equipment such as a residential heat pump and Universal covers every category; apprentices may assist only under continuous supervision by a certified technician. EPA's definition of technician is broad enough to include attaching gauges to measure pressure, so it is not only a matter of who adds refrigerant. The sales restriction closes the loop: only certified technicians, or employers providing written verification, may buy refrigerant for stationary equipment, and wholesalers must record the purchaser, date and quantity.

Contractor licensing is a state matter and worth checking on each visit rather than assuming. California's Contractors State License Board issues the C-20 classification and offers a public license check by number, name or business; Texas requires an air conditioning and refrigeration contractor license, Class A for any size system or Class B for cooling up to 25 tons and heating up to 1.5 million BTUs per hour, with liability insurance maintained throughout; Florida distinguishes an unlimited class A air-conditioning contractor from a class B contractor limited to 25 tons of cooling and 500,000 Btu of heating in any one system, and certified licensees who may work statewide from registered licensees confined to one jurisdiction. Newer systems also use A2L refrigerants that EPA classifies as mildly flammable, so ask whether the technician has been trained for the refrigerant in your system.

Maintenance that keeps a year-round system out of trouble

Because a heat pump never gets an off season, its maintenance schedule is denser than a furnace or air conditioner alone. ENERGY STAR recommends checking the filter monthly during periods of heavy use and changing it at minimum every three months, and advises cleaning heat pump filters when they look dirty or when the filter light says so. DOE's building science guidance is direct about why it matters: a dirty or clogged filter can dramatically reduce airflow, increasing run time, motor wear and energy consumption, and filters should be located where a homeowner can actually reach them.

Two service visits a year suit a heat pump better than one, timed before the heating season and before the cooling season, and each should produce readings rather than a checkmark. Useful numbers include temperature splits in both modes, total external static pressure, charge verification against the manufacturer's target, amp draws on the compressor and fan, and a check that auxiliary heat stages are engaging only when they should. Outside the visits, keep the outdoor unit clear year round: clippings and cottonwood in summer, leaves in fall, snow and ice in winter.

Warranty, records and the questions to ask before authorizing a repair

Before paying for a major part, find out whether it is already covered. Manufacturer parts warranties on heat pumps often run for years and frequently extend further on the compressor, but many require the system to have been registered shortly after installation, and most exclude failures attributable to incorrect charge, poor airflow or work by an unlicensed installer. Labor is usually separate, so a covered part can still arrive with a bill for fitting it.

Ask for the diagnosis in writing, naming the failed component and the measurements that identified it, and ask what else was checked so a symptom is not treated as a cause. For a refrigerant fault, ask specifically whether the leak was located and repaired or the system was simply topped up; a sealed system does not consume refrigerant, and a recharge without a repair is a bill you will pay again. Keep the reports with your installation paperwork so the pattern is visible over time rather than rediscovered at each visit.

Heat Pump Repair: frequently asked questions

Why does my heat pump blow air that feels cool in winter?

Because a heat pump delivers a large volume of moderately warm air rather than short bursts of very hot air as a furnace does. Supply air below body temperature still heats the house but feels cool on the skin. It is worth a service call only if the house is not actually reaching the thermostat setting, or if the auxiliary heat indicator is on most of the time in mild conditions.

Is steam coming off my outdoor unit a problem?

Normally no. In heating mode the outdoor coil collects frost, and the system briefly reverses to melt it, which produces visible steam and a stopped outdoor fan for a few minutes while backup heat covers the house. Frost that never clears, ice locking the fan, or defrost cycles running one after another are the versions that need a technician.

What does the emergency heat setting actually do?

It shuts the compressor out and heats the house with electric resistance elements alone. It is meant for a genuine equipment failure, not for cold weather, and DOE cautions against excessive use of resistance heating because it is inefficient. If it has been left switched on, turning it back to normal heating often explains and fixes an unexpectedly large winter bill.

My heat pump cools fine but heats poorly. What does that suggest?

Most often a low refrigerant charge, a reversing valve problem or a defrost fault. A system slightly low on refrigerant can cool acceptably while losing much of its heating capacity, with resistance heat quietly covering the shortfall. Since the circuit is sealed, low charge means a leak, so ask for the leak to be found and repaired rather than for another top-up.

Should I cover my heat pump for the winter?

No. Unlike a cooling-only condenser, a heat pump runs through the winter and needs unrestricted airflow across the outdoor coil. Keep snow cleared away from it, make sure defrost water can drain instead of refreezing beneath the unit, and keep it clear of snow falling from a roof. A cover that blocks airflow can cause exactly the icing problems it seems to prevent.

Can the same technician service both the heating and cooling side?

Yes, and on a heat pump it is the same equipment doing both. What matters is that they hold EPA Section 608 certification for refrigerant work, typically Type II or Universal for a residential system, and that they are licensed as your state requires, which may be a specific HVAC classification or a mechanical or general contractor license depending on where you live.

Sources

  1. EPA: Section 608 Technician Certification Requirements
  2. EPA: Section 608 of the Clean Air Act
  3. EPA: Refrigerant Sales Restriction
  4. EPA SNAP: Substitutes in Residential and Light Commercial Air Conditioning and Heat Pumps
  5. EPA: Frequent Questions on the Phasedown of Hydrofluorocarbons
  6. US Department of Energy: Purchasing Energy-Efficient Residential Air-Source Heat Pumps
  7. US Department of Energy Building Science Education: HVAC Proper Installation of Filters
  8. ENERGY STAR: Heat Pump Equipment Key Product Criteria
  9. ENERGY STAR: Heating and Cooling at Home
  10. California Contractors State License Board: Licensing Classifications
  11. Texas Department of Licensing and Regulation: Apply for an Air Conditioning and Refrigeration Contractor License
  12. Florida Statutes section 489.105: Contractor definitions

Written by the LokalMatch editorial team. Last reviewed September 14, 2026. How we write and check our guides

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What affects the cost of heat pump repair

Prices depend on the details of your project. We only publish price ranges when they’re backed by real LokalMatch quote data or reliable sources. Until then, here’s what usually changes the price:

  • Type of system and fuel source
  • Size and efficiency of the equipment
  • Condition of the existing ductwork and venting
  • Electrical or gas line changes
  • Access to the furnace room, attic or outdoor unit location
  • Removal and disposal of the old equipment
  • Emergency or after-hours service

How to compare HVAC technicians before you hire

  • Hire a technician who is licensed for heating, cooling and gas work in your area.
  • For a new system, ask for a load calculation for your home rather than a size based on the old unit.
  • Get written quotes that list the equipment, ductwork changes, removal of the old unit and any electrical work.
  • Ask how they handle service calls and repairs after installation, including in the middle of winter.
  • Compare the full scope of each quote, not only the equipment on it.

Questions to ask HVAC technicians before you hire

  • Are you licensed for this type of heating, cooling or gas work in my area?
  • How did you decide what size of system my home needs?
  • Does this installation need a permit, and will you take care of it?
  • What does the manufacturer's warranty cover, and what does your labour warranty cover?
  • Will you need to change the ductwork, venting or electrical to make this work?
  • Do you offer maintenance plans, and what do they include?
  • How quickly can you respond if the system stops working?

When to call a pro for heat pump repair

  • If you smell gas, leave the home and call your gas utility's emergency line from outside.
  • If a carbon monoxide alarm goes off, get everyone outside and call emergency services.
  • No heat in cold weather, or a furnace that keeps shutting off
  • Unusual noises, burning smells or a big jump in energy use

Heat pump repair permits and local rules

Some heat pump repair work needs a permit or has to meet local bylaws. Rules vary by municipality, so ask your pro whether a permit is needed and who will apply for it — and check with your city or town if you’re unsure.

Permits and licensing

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