KONGRA LLC · 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
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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?+
KONGRA provides diagnostics and coordinates certified contractors for refrigerant and sealed-system work. The scope, responsible provider and price are confirmed before work begins.