Menu Close

While you are waiting to make the call to a service agency, troubleshooting your air conditioner might get the cold air blowing again. It is a good idea to find out what could be wrong with your air conditioner even if you need to contact a technician.

Check the Power

Your AC unit might merely have a blown fuse or a tripped circuit if it is not turning on. Locate your electrical panel and determine whether any of the switches have shifted to the center position. If you notice a tripped switch, you might solve the problem by switching it off and on again. If none of the switches have been tripped, find the one, which operates your air conditioner. The switch might be market “furnace” in case you own a central air unit, as oftentimes the blower of the furnace is used to distribute cold air all over the house. Turning that switch off and on, might reset the connection and get your gadget to work. You should also check your furnace for a fuse required to operate its blower. Try to find it out and check it too. A dark spot in the glass portion of the fuse implies that the fuse is burned.

Turn on the Fan

Turning on the fan is another way to ensure whether your central air system is getting power or not. It is located just near the auto switch. You know the blower is receiving power if the fan starts when you switch it to “on.” You may still have problems such as a damaged thermostat or issues with the AC unit itself. You might have a blower problem if the fan does not turn on.

Thermostat Troubleshooting

Your home’s thermostat controls central air conditioners. Check its settings to confirm that someone did not unintentionally move it off “auto” or “cool.” Also, check the temperature to confirm somebody did not change it by accident. Programmable modern thermostats run off of battery power. Put in fresh batteries if you have not changed them for more than a couple of months. Often that is sufficient enough to get the AC working again. The chances are likely that the thermostat itself has conked out. You can easily install a new thermostat by yourself, in case you determine that it is the root of the problem.

Other Troubleshooting Tips in case your Air Conditioner is not working

Make sure the condensation drain is functioning correctly on both room and central air conditioner units. It might lead to malfunctioning of your air conditioner if it is clogged. Locate and remove the panel covering the condenser coils. Room or central air conditioners will not function efficiently if their coils are blocked or dirty. If water is dripping from your room air conditioner, ensure that the water collector pan, which collects water dripping from the condenser coils and drains them out through a tube on the back of the unit, is properly seated. Room air conditioners contain a thermostat sensor behind the control panel. Check whether the sensor is damaged or knocked out of position. The cooling capacity of central air units is reduced if its air filter is clogged. You can find this filter located near your furnace.