It’s the first hot day of spring and your central air conditioner won’t turn on, or isn’t blowing cold air. What should you do? There can be many causes when an AC won’t run or cool sufficiently. Here are a few things you can check yourself before calling for service.
1. Thermostat or Sensor Problems
Check that the thermostat is set to “cool” and is set low enough to turn the unit on. Also ensure that the batteries are charged if the thermostat has batteries. If the unit still will not turn on, check that the circuit breaker hasn’t tripped. If the breaker has tripped reset it to the on position. If it trips again, don’t reset the circuit. Call for service to have the electrical problem fixed.
2. Drainage Problems
A damaged refrigerant line or broken fan can cause the air conditioner coil to freeze, which in turn will cause the unit to malfunction. Ensure that the drain pan is not backed up. If it is clogged, clear the drain line to empty the pan.
3. Dirty Furnace Air Filter
Air filters should be replaced monthly or as recommended by the filter manufacturer. A dirty filter will cause the air conditioner to run more frequently, reducing efficiency, wasting energy and shortening the lifespan of the unit. If the filter becomes excessively dirty it can cause the AC to malfunction and shut down.
4. Leaking or Obstructed Air Ducts
Air ducts are an often overlooked part of a home’s cooling system. Air duct cleaning and sealing can ensure that your system cools as efficiently as possible without wasting energy.
5. Low Refrigerant Levels
An air conditioner that is running, but staying on too long and not cooling properly, may have a refrigerant leak or be insufficiently filled.
When problems arise with central air conditioners it’s usually the result of lack of maintenance or an aging unit that is reaching the end of its lifespan. If you’re experiencing problems with your home’s air conditioner, call Superior Plumbing and Heating. From annual AC maintenance and repairs, to new cooling system installation, we have you covered.