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Why Is My Heat Pump Running But Not Cooling Properly?

If your heat pump runs but won’t cool, common causes are incorrect thermostat settings, blocked airflow, dirty coils/filters, or low refrigerant. Endless Energy diagnoses and repairs heat pumps, and offers deep cleanings and maintenance plans to keep cooling reliable in Weston and across Massachusetts.

Quick checks:

  • Set thermostat to Cool, target temperature below room.
  • Replace or clean filters.
  • Clear debris around the outdoor unit.
  • Check for ice on lines or weak airflow.
  • If breakers trip or issues persist, stop and call.

Updated: 2025-12-22 00:00:00

Need help in Weston, MA? Call (508) 501-9990 or book online.

"Hunter and Mike were awesome and very clean at installing our super quiet mini-split heat pumps" — Greg J.

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