AC Does Not Shut Off When Set Temp Reached? Here’s Why and How to Solve It

Air Conditioner becomes an electronic item that must be in your home when you live in a hot area. But what happens if the AC does not shut off when set temp is reached?

One common issue is incorrect thermostat settings. If the thermostat settings are not calibrated correctly, your air conditioning system may not recognize when the desired temperature is reached. This can cause the air conditioner runs continuously, leading to increased wear and potential damage.

Not only a waste of electricity, but the room temperature in your house can also be very cold. If a problem occurs, it is because the AC unit is constantly on and never turns off. Here we give some reasons why the AC won’t turn off and how to fix it.

Several Reasons Why AC Does Not Shut Off When Set Temp Reached

If the AC cannot turn off automatically when set temperature reached, there are several reasons why it can happen:

ac does not shut off when set temp reached

Blower fan setting error. It is the simplest thing to know about the AC problem. This can happen because the AC is constantly turned on. Another factor to consider is wear and tear on the blower motor. Over time, the blower motor in your air conditioning system can become less efficient, causing the unit to continues to run even after reaching the set temperature.

Clogging of the air filter. If the air filter is dirty, it will hinder the ability of the AC unit. If the air filter is not checked or replaced regularly, it will cause long-term damage. Therefore, the air filter should usually be replaced every 30-90 days, depending on the AC load.

Read also: How to Reset Clean Filter on LG Air Conditioner

Set temp is reached the dirty evaporator coil. The evaporator coil is the controller of the air inside the air conditioner. These objects play an important role in the ability of the air conditioner to cool the air. If the evaporator is clogged with dirt, mold, or other contaminants, the cooling cycle will not stop.

Extreme weather conditions. In some areas, frequent heat waves can reach three-digit temperatures. At that time, even the best brand air conditioners couldn’t keep up with the hot temperature. As a result, the air conditioner continuously tries to cool the temperature in a very hot room.

The air conditioner which is too small, but the room is big enough. This causes the air conditioner to work in overdrive to reach the desired temperature. However, this was not successfully done by the system from the AC. Well, because the AC also never turns off, the energy consumption will be so much and cause your electricity bill to swell.

The last reason that makes your AC can’t turn off automatically is that you have to replace your AC. Yes, actually, most AC brands can only last for 15 years. So, if your AC can’t be turned off, it’s possible that your AC is old and should be replaced with a new one immediately.

Ways to Repair The Air Conditioner Doesn’t Turn Off Automatically

First, check the thermostat. It is possible that the AC thermostat cannot reach the AC temperature that has been set. It can happen if you set the AC temperature too low. Therefore, you have to set the AC temperature to normal or room temperature. If the thermostat still doesn’t turn off the AC, then there may be another problem with your AC.

The second way that can be used to fix the problem of the air conditioner doesn’t turn off automatically is to clean the condenser. If the condenser coil is dirty, you can clean the filter and test your AC again.

Then, you can also check the fan limit switch. The fan inside the fan can only work if instructed by the thermostat. However, the air conditioner also has a fan that can be replaced manually. Sometimes the fan switch is accidentally set to automatic, not manual, so the air conditioner turns on constantly.

Those are some reasons AC does not shut off when set temp is reached. Therefore, you can perform the repair steps as explained above. However, if your air conditioner still cannot be turned off, then you must contact the air conditioner repair service so your air conditioner can be repaired immediately.

Regular maintenance, including checking for frozen evaporator coils and ensuring the air handler is in good condition, can prevent many of these issues. It’s also wise to let your air conditioner rest for about 15 to 20 minutes after reaching the set temperature to avoid overworking the system.

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AirconMag is an experienced author and Air Conditioner expert. With years of practical experience in the field authored several informative articles on various aspects of AC unit, including installation, maintenance, and repair