Heat Pump Troubleshooting
Heat Pump Not Cooling — Causes & Repair
When a heat pump will not cool, the cause may involve airflow, controls, refrigerant, drainage, electrical components, equipment capacity, or installation. RG Mechanical provides diagnostic service throughout Augusta, Waterville, Gardiner, and surrounding communities, subject to equipment and scheduling availability.
What to Expect
Check that the thermostat is set to COOL mode
Check air filter — a clogged filter blocks airflow and kills cooling
Outdoor unit may be dirty or blocked — needs coil cleaning
Low refrigerant is a common cause of poor cooling
Capacitor failure can prevent the compressor from starting
Scheduling depends on current demand, diagnosis, and parts availability
Frequently Asked Questions
Why is my heat pump running but not cooling?
Possible causes include a clogged filter, dirty coil, incorrect control setting, low refrigerant from a leak, a failed capacitor, or insufficient capacity. Repair scope and timing depend on diagnosis, access, and parts.
Can I check anything myself before calling a technician?
Check your thermostat settings, replace or clean the air filter, and make sure nothing is blocking the outdoor unit. If those don't help, call us for professional diagnosis.
My heat pump cools some rooms but not others. Why?
Uneven cooling in a multi-zone system usually indicates one zone's indoor unit needs service — refrigerant may be low, or the coil needs cleaning. In ducted systems, it may indicate an airflow or duct issue.
How long does an AC or heat pump cooling repair take?
Repair timing depends on diagnosis, equipment access, refrigerant work, parts availability, and scheduling. The technician can explain the expected next steps after inspecting the system.
Ready to get started?
Call us or request a project estimate. Contact RG Mechanical to confirm service availability for your community.
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