Heat Pump in Greater Berwyn Area

A heat pump not cooling on hot days is usually caused by restricted airflow, incorrect thermostat or electrical settings, or a system fault that prevents heat from moving out of the home. The most common real-world trigger is a clogged air filter that starves the indoor coil of air, which can also lead to icing and short cycling.

Our technicians often see this in summer around Bryn Mawr and resolve it with simple airflow fixes or targeted repairs when an air handler or outdoor unit is malfunctioning.

Try these quick checks before a service visit:

• Set the thermostat to Cool and lower the setpoint by at least 3°F.
• Replace or clean the air filter to restore airflow.
• Look for frost on the outdoor unit; if you see ice, turn the system off to thaw.
• Check the breaker and reset once if it’s tripped.

If these steps don’t restore cooling, schedule a diagnostic; same-day appointments are available. Turn the system off if the outdoor unit is frozen to prevent damage.

Updated: 2026-04-07

Need help in Bryn Mawr, PA? Call (484) 443-2881 or book online. "The heat pump that was installed August 2024 was not working properly... they immediately sent someone out the same day and solved our issue by readjusting the thermostat settings." — Craig W.