HVACDIAGNOSTIC
Problem Cluster

AC Not Cooling

The single largest HVAC troubleshooting cluster. AC running but not producing cold air—warm air, poor cooling, cooling failure.

Symptoms in This Cluster

AC Blowing Warm Air

Your air conditioner is running, but the air coming out of the vents is not cold.

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Condition Variations
AC Running but Not CoolingAC Not Cooling House but Unit RunningAC Not Cooling After Filter Change

Ice on Outdoor Unit

Frost or ice buildup on the coils of your outdoor AC or heat pump unit.

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Condition Variations
Ice on Outdoor Unit in SummerIce on Outdoor Unit in WinterIce on Lines and Evaporator Coil

Humidity Too High Indoors

Your home feels clammy or sticky even when the AC is running.

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Condition Variations
Humidity Too High Upstairs OnlyHumidity Too High in Extreme Heat

Related Clusters

AC Freezing UpAC Short CyclingAC Running ConstantlyRefrigerant ProblemsAC Making Noise
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