Spring is the best time to schedule air conditioning maintenance with a qualified HVAC professional. Having your air conditioner maintained professionally will keep it in optimum operating condition during the cooling season, and will also save you money on utility costs by improving its overall efficiency. However, even with preventive maintenance, things can go wrong with your air conditioner. This troubleshooting guide will help you pinpoint the problem and possibly resolve it before service is needed.
Problem: Air conditioner won’t turn on.
- Check the thermostat to make sure it’s set to “cool.”
- Check the circuit breakers associated with your air conditioner to make sure they haven’t tripped.
- Check that all the air conditioner switches, including the external safety switch.
- If your unit has a condensate overflow tray, check to make sure it isn’t overflowing, which may cause a sensor switch to turn the unit off.
- Make sure the blower door is securely closed.
Problem: The airflow from the vents is too low.
- Check your air filter and replace it if it’s dirty. A dirty filter will impede the flow of air to your system.
- Make sure your ductwork is intact. A loose joint can reduce airflow. Repair the damage with metal tape or mastic sealant.
- Check the dampers on your supply registers to make sure they’re open.
Problem: The air conditioner kicks on too frequently.
- Make sure your thermostat isn’t obstructed.
- Check the outside condensing unit for debris or bent fins. If the fins are bent, straighten them with a fine comb.
- Check your air filter and replace it if it’s dirty.
If your system is still operating improperly, call a service technician for air conditioning maintenance. If your system hasn’t been maintained, the problem will most likely be solved with a service call, but it’s a good idea to ask your technician to perform preventive air conditioning maintenance on your system to prevent more problems down the road.
HVAC professionals agree that your best defense against mid-summer breakdowns is preventive air conditioning maintenance at the beginning of the cooling season. If you haven’t already scheduled your service call, now is a good time to do so!