When in doubt, or when electricity is involved, it’s best to call the pros. However, there are several troubleshooting steps that might get results.
FOCUS ON THE FAN
Make sure the thermostat is on the cooling mode and lower the temperature. Does the fan come on? If not, your next step is to check the circuit breaker panel.
CHECK THE CIRCUIT BREAKER PANEL
Solving the problem might be as easy as flipping a switch or two. For example, the unit might have one switch for the condenser and another for the fan, notes Marina Vaamonde, a home-remodeling expert and owner of HouseCashin in Houston, Texas.
REVIEW THERMOSTAT SETTINGS
The thermostat could be the culprit. Review the display screen/setup to ensure all the options are correct or do a reset, says James Strilcic, owner of JPS Furnace & Air Conditioning in Calgary, Alberta.
INVEST IN A NEW THERMOSTAT
Consider a new one if you’ve upgraded your AC or furnace but not your thermostat. The new functions let you control the temperature when you’re away, which can lower your bills.
LOOK FOR CLOGGED DRAINS
Leaking water could indicate a clogged drain on the condenser. “This is a common issue and is usually an easy fix,” Collier says.
SURVEY THE VENTS
Closed or obstructed vents will restrict the airflow. Tour the house and move anything that’s covering a vent.
INSPECT THE FILTER
Filters trap pollutants, so the air remains clean. A clogged filter affect the airflow. “It’s crazy how many people don’t change the filter or clean it as needed,” Strilcic says.
The company’s Smart AC Controllers for ductless units will send status notifications to your phone if the filter needs attention.
REMOVE DEBRIS FROM AROUND THE UNIT
Leaves and overgrown grass can interfere with the air flow of a whole-house unit. Remove any weeds and debris from the area. Similarly, clean the condenser coils regularly.
TIGHTEN THE SCREWS
Strange sounds are another frequent concern. “A number of different things can cause these noises, and the most common is that something on the unit has come loose or has broken,” says Walter Bennett of Green Leaf Air in Dallas, Texas.
CALL AN HVAC EXPERT TO INSPECT THE CAPACITOR
In high heat, the unit’s capacitor works overtime to maintain a consistent temperature, which can lead to failure. Faisal says that power fluctuations and unexpected temperature changes can also damage capacity. Don’t attempt to repair a broken capacitor on your own. “It can result in an electric shock,” Faisal warns.