Why Is My Heat Pump Running But Not Cooling Properly?

Your heat pump may run but not cool due to airflow blockages, low refrigerant, dirty coils, or a control issue like a stuck reversing valve or defrost fault. Summers Plumbing Heating & Cooling can diagnose and fix this, including 24/7 emergency repairs. Our licensed, trained technicians service homes in areas like Naperville and Aurora.

Quick checks:

• Set thermostat to Cool and lower 3–5°F.
• Replace/clean the air filter.
• Clear debris 2–3 feet around the outdoor unit.
• Look for ice on coils; if present, turn system off and call.

Updated: 2025-11-07

Need help in Naperville, IL? Call (331) 294-8731 or book online.