Heat Pump Not Cooling

Professional Heat Pump Not Cooling in Asheville & Western NC

A heat pump that provides reliable heat in winter but cannot cool in summer — or the reverse — has failure modes distinct from a conventional AC system.

What Causes a Heat Pump Not to Cool

Heat pumps operate on the same refrigeration principle as a standard AC, with a reversing valve that flips the refrigerant flow direction to switch between heating and cooling. When cooling fails, the usual suspects are a stuck reversing valve that will not shift from heat to cool, low refrigerant from a system leak, a compressor that is weak or has failed, a fouled outdoor coil limiting heat dissipation, a dead outdoor fan motor, or a thermostat not sending the proper mode signal.

Quick Things You Can Check

Confirm the thermostat is on 'cool' (not 'heat' or 'fan only') with the setpoint below room temperature. Walk outside and look at the condenser — if the fan is not spinning, the compressor is not running either. Check the breaker. Swap in a clean air filter. If the outdoor fan is turning but the supply air inside remains warm, the reversing valve or refrigerant charge is the likely issue.

When This Becomes a Serious Problem

Operating in cooling mode with insufficient refrigerant will eventually freeze the indoor coil, producing water damage as the ice melts. A stuck reversing valve can leave the system in heating mode — actively adding heat to your home on a summer day. If the system is also running nonstop without producing cool air, the situation is compounding.

When to Call for Heat Pump Repair in Asheville

If thermostat settings check out and the outdoor unit runs but indoor air stays warm, professional diagnosis is needed. Quality Mechanical provides heat pump repair in Asheville — we test reversing valve operation, measure refrigerant pressures, and evaluate compressor performance on the initial visit.