Common Causes
- Dirty or clogged air filter restricting airflow
- Low refrigerant from a leak in the system
- Frozen evaporator coil
- Dirty outdoor condenser coil
- Thermostat set incorrectly or malfunctioning
What You Can Try
- Check and replace the air filter if it's dirty.
- Make sure the thermostat is set to "Cool" and below room temperature.
- Clear any leaves, dirt, or debris from around the outdoor unit.
- If the system is still not cooling, turn it off and call for service — running a frozen or low-refrigerant system can cause further damage.
If these steps don't resolve the issue, stop troubleshooting and call a licensed technician — repeated restarts or DIY repairs on gas or electrical components can be unsafe.
