AC Not Cooling? What Littleton Homeowners Can Check

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Safe checks before scheduling service

1. Confirm the thermostat is on COOL and set below room temperature.
2. Check whether the return-air filter is heavily loaded with dust.
3. Look for blocked supply or return vents.
4. Check whether the outdoor unit is operating and unobstructed.
5. If ice is visible on refrigerant lines or the indoor coil area, turn cooling off and allow the system to thaw before service.

If you encounter exposed wiring, smoke, a gas odor, a carbon-monoxide alarm, or another immediate safety concern, stop troubleshooting and follow the appropriate emergency guidance.