HVAC diagnostics
AC Not Cooling — Diagnostic Checklist
Illustrative checklist for central AC and mini-split systems that run but don't cool. Not a claim of a specific completed job — actual findings depend on on-site diagnostics.
Common causes
What we check on site
Dirty air filter / restricted airflow
Iced-over evaporator coil
Dirty condenser coil
Failed capacitor
Failed contactor
Low refrigerant charge
Blower motor issue
Thermostat or control fault
Related
Related services
Reviews
Share your experience
FAQ
Frequently asked questions
What do you check first when an AC isn't cooling?+
Thermostat call, airflow, filter, indoor and outdoor coil condition, refrigerant charge indicators, capacitor and contactor, and electrical supply.
Do you handle refrigerant work?+
Refrigerant and sealed-system work is performed only within KONGRA's legal license scope. Some work may require a properly licensed specialist.
Is the diagnostic paid?+
Yes. Diagnostic is a paid on-site visit with proper instruments and service data.