AC Not Cooling Services
Targeted diagnosis when the indoor fan operates but room temperatures fail to drop or keep climbing throughout the day.
Pinpointing the exact mechanical or thermodynamic breakdown preventing your AC from cooling.
Targeted diagnosis when the indoor fan operates but room temperatures fail to drop or keep climbing throughout the day.
Common Symptoms
- Indoor fan is running and blowing air, but the air is room temperature
- Thermostat is set to 72°F, but the house stays at 80°F or higher
- Outdoor unit is silent or hums without the condenser fan spinning
- System runs for hours without cycling off while comfort deteriorates
- Noticeable temperature variation between rooms closest to the air handler and distant bedrooms
Possible Causes
- Defective compressor run capacitor preventing the compressor from starting
- Low refrigerant level due to microscopic corrosion holes in the copper tubing
- Stuck or failing thermal expansion valve (TXV) restricting refrigerant flow
- Outdoor condenser coils heavily matted with dirt, pet hair, or lawn clippings
- Disconnected 24V thermostat control wire (yellow "Y" wire responsible for cooling call)
Safe Homeowner Checks
- Check thermostat settings: ensure it is in "COOL" mode, not "HEAT" or "FAN ONLY"
- Lower the setpoint temperature 5 degrees below the current room temperature to verify demand
- Inspect your furnace/air handler filter. A completely clogged filter starves the system of air
- Walk outside and check if the outdoor unit is spinning and exhausting warm air out the top
Frequently Asked Questions
Why is the fan inside blowing air, but the air is not cold?
When the indoor blower fan runs but the air is room temperature, the indoor unit is likely functioning while the outdoor condensing unit (compressor or fan) has failed to turn on due to a bad capacitor, tripped breaker, safety switch trip, or compressor failure.
Can a dirty air filter stop an air conditioner from cooling?
Yes. A severely clogged filter restricts airflow across the evaporator coil, preventing warm indoor air from exchanging heat. This can drop coil temperatures below 32°F, causing the entire coil to freeze solid and block all air passage.
Need AC Repair in Your Area?
Call (833) 889-1258 to connect with a cooling specialist.
Call (833) 889-1258