Can I fix a refrigerant leak myself?

No. Refrigerant must be handled by an EPA-certified technician. Adding refrigerant without repairing the leak is illegal and will not last.

Why does my AC blow warm only at night?

A unit that blows warm when it is cooler outside can point to a refrigerant issue, dirty condenser, or failing compressor. It is worth diagnosing before it fails completely.

Why Is My AC Blowing Hot Air?

Section 1

Check the thermostat first

Make sure the thermostat is set to Cool, not Heat or Fan Only. Verify the set point is below the room temperature. If you have a heat pump, confirm the reversing valve is not stuck in heating mode.

Related: HVAC service in Greenville, SC

Section 2

Inspect the air filter and breaker

A clogged filter can freeze the indoor coil, which blocks airflow and makes the vents feel warm. A tripped breaker or blown fuse can shut down the outdoor unit while the indoor fan keeps running. Reset the breaker once; if it trips again, call for service.

Section 3

Refrigerant and compressor issues

Low refrigerant from a leak means the system cannot absorb enough heat. A failed compressor cannot pump refrigerant at all. Both require EPA-certified handling, leak detection, and proper repair. Do not add refrigerant without finding the leak first.

Section 4

When to call Ascend

If the thermostat and filter look fine but the air is still warm after 30 minutes, schedule a diagnostic. We will measure pressures, temperatures, and airflow to pinpoint the cause and give you a flat repair price.

Frequently asked questions

Can I fix a refrigerant leak myself?: No. Refrigerant must be handled by an EPA-certified technician. Adding refrigerant without repairing the leak is illegal and will not last.
Why does my AC blow warm only at night?: A unit that blows warm when it is cooler outside can point to a refrigerant issue, dirty condenser, or failing compressor. It is worth diagnosing before it fails completely.

Services mentioned

AC Repair

Fast, professional diagnosis and repair of residential cooling systems.

Emergency HVAC Repair

Urgent heating and cooling failures handled with fast diagnosis and clear options.

HVAC Maintenance

Routine maintenance designed to improve reliability and catch problems early.

AC repair by city

We serve Greenville County, SC and Spartanburg County, SC and Anderson County, SC and Pickens County, SC. Pick your city for local pricing, response times, and scheduling.