Check the thermostat
Confirm it is set to Cool and below the indoor temperature. If it was changed recently, allow time for the system to respond.
Tropicool Answers · St. Augustine, FL
AC Running but Not Cooling
The system is on, but your rooms are staying warm. A few basic checks can help you explain the problem when you call.
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Three useful checks
Look at the filter and vents
A heavily loaded filter or blocked return can restrict airflow. Replace a dirty filter with the correct size and keep supply and return openings clear.
Notice what is running
Is air coming from the vents? Is the outdoor unit running? These observations help narrow the service visit, but they do not identify a failed part.
When to stop and call
If ice is visible, switch the cooling system off and arrange service. Do not keep running a system that is freezing.
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Frequently asked questions
Why is the AC on but blowing warm air?
Thermostat settings, airflow, outdoor-unit operation and cooling components can all affect the result. Testing is needed to identify the cause.
Should I add refrigerant?
A refrigerant charge should be evaluated by a qualified technician. Low refrigerant may indicate a leak that needs attention.
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