Troubleshooting Tips


If your heating or air conditioning system isn’t working, here are some simple things you can try before calling for service:


Make sure your thermostat is set to the proper temperature and that it has been switched from heat to cool (or vice versa). Sounds simple, but it happens. Change the temperature settings a few degrees temporarily to see if the system responds. If you want air conditioning, make sure the temperature control selector is set below room temperature and the “SYSTEM” switch is on the “COOL” position. If you want heat, make sure the temperature control selector is set above room temperature and the “SYSTEM” switch is on the “HEAT” position. The “FAN” switch should be set to “ON” for continuous blower operation or “AUTO” if you want the blower to function only while the unit is operating.

Circuit Breakers And Fuses

Start by confirming that power is available to your home comfort system. Check your main electric service entrance panel for tripped circuit breakers or blown fuses. You may have a power switch, circuit breaker or fuse panel just for your heating and air conditioning equipment located on or near the equipment itself. Be sure to check that too. If everything is okay, you can assume that power is available to your equipment. A frequently tripped electrical breaker or blown fuse may mean that there is an issue that needs to be corrected by a trained service technician.

Gas Supply

If your furnace uses gas for heating, check that the supply line control valve is open. The handle should be parallel to the pipe.

Condition of Your Air Conditioner

Dirt and debris around the coils of the outside unit of your air conditioner can compromise efficiency and reduce its cooling power. If a light layer of cottonwood or some other debris has accumulated on the outside of the unit, it can be cleaned off with a gentle stream of water from your hose. For safety, be sure to shut of the power before you perform any cleaning of the unit itself. We recommend a trained service technician perform a thorough cleaning of your unit annually to minimize this problem.

The Filter

Depending on filter type, it is recommended that you replace or clean the furnace filter as often as once a month when the system is running regularly. Failure to do so can cut down on your system’s ability to properly cool or heat your home.

Proper Airflow

Make sure that supply-air registers and return-air grilles are open and unobstructed. Blocked grilles can make rooms too hot or too cold.

If you’ve done these few preliminary checks and adjustments and your home comfort system still isn’t working, it’s time to call Atomatic at 847-818-4300!