Heat Pump Repair in Knoxville, TN

Heat Pump Specialists · Knoxville · East Tennessee

Heat pumps are the most versatile HVAC systems in East Tennessee — providing both heating and cooling from a single unit. They’re also among the most misunderstood when they malfunction. Aire Care Mechanical’s technicians know heat pumps inside out and diagnose them accurately every time.

Heat Pump Repair That Starts With Understanding How They Work

A heat pump operates differently from a standard air conditioner or gas furnace — it moves heat rather than generating it, running in both directions depending on the season. In summer it pulls heat out of your home like a conventional air conditioner. In winter it reverses, extracting heat from outdoor air and moving it inside. This dual-mode operation means heat pump failures have unique characteristics that require technicians who understand the system.

Aire Care Mechanical diagnoses and repairs all heat pump types throughout the Knoxville area — including split system heat pumps, heat pump package units, and mini-split systems. We also handle gas furnace repair for dual-fuel systems and general AC repair when cooling-mode issues are the primary concern.

Every heat pump call begins with a complete diagnosis — both heating and cooling modes tested when conditions allow — so we understand the full picture before recommending any repair.

Heat Pump Repair You Can Trust

• Both Modes Diagnosed – We test heating and cooling operation — not just the mode that failed.
• All Heat Pump Types – Split systems, package units, mini-splits, and dual-fuel configurations.
• Refrigerant Certified – EPA 608 certified technicians handle refrigerant safely and legally.
• 30-Day Repair Warranty – Every heat pump repair is backed by our 30-day warranty.
• Honest Replace vs. Repair Advice – We tell you what’s actually in your best interest — always.

Common Heat Pump Problems We Fix

Heat pumps fail differently than standard AC and furnace systems. Here’s what we see most often in East Tennessee.

Reversing Valve Failure

The reversing valve allows a heat pump to switch between heating and cooling modes. A failed reversing valve — or a faulty solenoid coil — causes the system to get stuck in one mode. Accurate diagnosis determines whether it’s the valve itself or just the solenoid, which significantly affects repair cost.

Not Heating in Winter

East Tennessee homeowners sometimes assume their heat pump has failed when it’s actually operating normally during defrost cycle. True failure signs include the system blowing continuously cool air, auxiliary heat not engaging, or the outdoor unit freezing solid. See also: furnace repair if you have a dual-fuel system.

Not Cooling in Summer

In cooling mode, heat pump failures often mirror standard AC repair issues — failed capacitor, refrigerant leak, dirty coils, or a compressor problem. The diagnostic approach is similar, but the reversing valve and defrost system add additional checkpoints.

Refrigerant Leak

Heat pumps are sealed refrigerant systems — if the charge is low, there’s a leak. We locate and repair the source, then recharge to manufacturer specification. Simply recharging without finding the leak is a temporary and expensive band-aid.

Defrost System Issues

Heat pumps are designed to periodically defrost their outdoor coil in winter. If the defrost system isn’t working correctly, ice accumulates on the outdoor unit, blocking airflow and reducing efficiency — eventually damaging the compressor if left unchecked.

Compressor Failure

A failed compressor is the most serious heat pump failure. Depending on system age and the cost of compressor replacement versus a new system, we’ll give you an honest comparison. A new heat pump installation may offer better long-term value than a costly compressor replacement on an aging unit.

Heat Pumps in East Tennessee’s Climate

Heat pumps are particularly well-suited to East Tennessee’s climate. Our winters are moderate enough that heat pumps operate efficiently for the vast majority of heating hours. Extended sub-20°F temperatures — where heat pump efficiency drops and auxiliary heat takes over completely — are uncommon in Knox County and most of the surrounding region.

This makes heat pumps an excellent choice for East Tennessee homes, especially those without natural gas service. A properly sized heat pump provides efficient year-round comfort with a single system, a single maintenance program visit covering both modes, and no gas combustion concerns.

For homes on slab foundations, a heat pump package unit provides the same efficiency advantage in an all-in-one outdoor cabinet — common in manufactured homes and many older ranch-style properties throughout the Knoxville area.

Schedule Heat Pump Repair

Same-day and next-day appointments available throughout Knox County. Emergency after-hours service available.

Service Areas