Don’t let a faulty air conditioner ruin your day. Call Apollo Air Heating & Cooling at 210-940-2052 to schedule a reliable repair service! A fully functional air conditioner in the heat of Texas is a godsend for many homeowners in San Antonio. Having cool air throughout your home can be refreshing, but your electricity bill can suffer if your unit is excessively cooling your home. If you’re wondering, “Why won’t my AC turn off?” you probably have concerns about your unit’s performance and your upcoming utility bills.  Let our team at Apollo Air Heating & Cooling, a professional HVAC company in San Antonio, TX, explain the causes and what you can do to fix it.

WHY YOU SHOULDN’T RUN YOUR AIR CONDITIONER CONTINUOUSLY

Running your blower fan 24/7 can bring excessive wear to your system, causing parts such as your air filter to clog with dirt faster and coils to burn through their life cycle more quickly. If your unit runs for hours without stopping, this is a clear sign that something internally is malfunctioning, causing the natural cooling cycle to stop. Typically, cooling cycles only need to run for about 20 minutes to lower the temperature of a given room. Anything more frequent than a few times an hour can harm your air conditioner.

WHY WON’T MY AC TURN OFF?

If your unit isn’t turning off, it can mean many things, from faulty wiring to improper sizing. Here are the most common reasons why your air conditioner won’t turn off.

INCORRECT THERMOSTAT SETTINGS

If your thermostat is set to have your air conditioning unit continuously run, this could override the cooling cycle. If set to “Auto,” your unit will operate according to the cooling cycle, turning on for short bursts each hour. Setting your thermostat to “Auto” instead of “On” can help fix this issue.

MALFUNCTIONING THERMOSTAT

The thermostat is responsible for telling your air conditioner what the room temperature should be, which makes it an important component of your home’s temperature control. If your thermostat is malfunctioning due to damaged electrical wiring or sensors, it may cause your air conditioner to keep running. In this case, replacing the thermostat is necessary.

DIRTY COILS

When asking, “Why won’t my AC turn off?” you may need to check the coils. If your coils are dirty, your air conditioner can’t function nearly as well. This causes the unit to overcompensate, fighting to cool a room for longer than it normally would. AC Coil Cleaning services can help resolve this issue and improve your unit’s efficiency.

DUSTY AIR FILTER

For the same reason dirty coils impact your air conditioner’s output, dust-filled air filters also bottleneck your system’s performance. If your air filter is clogged with dust and dirt, this creates heat on the inside of the machine, which can prevent your unit from operating at full power.

FAULTY LIMIT SWITCH

A limit switch is responsible for turning your air conditioning fan on and off when it senses a rise or fall in temperature. If your limit switch is stuck in override mode, it will run your fan even when your unit is not cooling. This can be bad for your blower motor and cause it to work far harder than required.

LACK OF REFRIGERANT

If you have frozen evaporator coils, your cooling unit can’t use refrigerant to absorb heat. Without functional coils, your air conditioner will overheat much more easily. If you have a refrigerant leak, the same is also true.

LOW FAN SPEED

If you have your air conditioning unit’s fan settings set to low, your system may not be able to cool a room, no matter how long it runs. Change the fan speed on your unit to see if this resolves the issue.

INAPPROPRIATE UNIT SIZE

If your air conditioner is too tiny for your home, it will never cool off the entire space. When purchasing your air conditioning unit, do some research regarding how much space the machine can effectively cool.

LEARN MORE ABOUT YOUR AC UNIT WITH APOLLO AIR HEATING & COOLING

Now that you’ve learned the answer to the question, “Why won’t my AC turn off?” let our professionals at Apollo Air Heating & Cooling restore your system. With our expert service, we address HVAC issues quickly and at competitive prices, whether you have a faulty air handler or need a whole new unit. Call Apollo Air Heating & Cooling at 210-940-2052 to schedule AC repair in Sant Antonio, Texas, today!