Why Is My Heat Pump Running But Not Cooling Properly?

A heat pump that runs but doesn’t cool usually has an airflow, refrigerant, or control problem. Common causes include a dirty filter or coils, low refrigerant from a leak, incorrect thermostat settings, a blocked outdoor unit, or a sticking reversing/expansion valve. Our licensed techs handle diagnostics and repairs, and we recommend twice-annual tune-ups (spring and fall) in Noblesville and Carmel to prevent issues.

Quick checks:

• Set thermostat to Cool and lower the setpoint
• Replace a dirty air filter
• Clear debris around the outdoor unit
• Open closed supply/return vents

Updated: 2025-12-30 00:00:00

Need help in Carmel, IN? Call (317) 795-1651 or book online.

"I feel confident our older heat pump is good for another winter." — Mary B.