Why won’t my AC turn off?

We all appreciate our air conditioners, especially during the hot summer months when we cannot get enough of the cool air that comes out of well-performing ac units. When the unit works well it is easy to even forget that you have left it on. But what happens when you need to turn it off and it just doesn’t? What happens when the unit that you have taken for granted for so long stops working or needs a repair?

One of the most common issues that people experience with their AC unit not switching off. This affects the energy consumption, bill and efficiency of the unit.

The most common reason that your Air Conditioner fan won’t turn off is that a stuck relay keeping the circuit closed. If it’s not the relay, your thermostat likely has a shorted cable or needs to be replaced.

Before you panic and think of replacing the complete ac unit or spend too much money buying an aircon and heater service, it is important to check what is wrong with it. To make sure that you need a repair and that the fan within the AC doesn’t turn off, first adjust the temperature. Increase it to match the room and see whether the fan turns off or slows down. Double-check the thermostat and make sure the fan is not set to ON. If it still keeps working even if the setting is on AUTO or OFF, you need a repair.

After you’ve ensured that the settings are correct, contact your trusted HVAC technician to troubleshoot further and resolve the issue. Here’s what they may find:

Stuck Relay — Relays is a component within the unit in your air conditioner that opens and closes electrical circuits to turn the fan on and off. Relays fail or get stuck together because of electrical currents, causing a circuit to stay closed and constantly supply power.

Malfunctioning Thermostat — A faulty thermostat will not know when the desired temperature has reached and can cause the fan to run constantly. If the temperature runs below what is actually set it is clear that you need a repair done.

NOTE: Sometimes the entire air conditioner unit (not just the fan) runs continuously in order to reach the desired temperature, making it inefficient. The result is clogged or restrictive air filters, dirty or frozen evaporator coils, dirty or blocked condensers, or low refrigerant.

Schedule an annual air conditioner tune-up to keep your system operating at peak performance.
Although a constantly running air conditioner fan can help battle allergies by keeping the air filtered, it causes unnecessary wear on the motor and increased energy costs. Book an appointment with Quick Air and get your av and heater service and repairs done within 24 hours.

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