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Why does my air conditioner turn off by itself?

If your air conditioner keeps turning on and off your Air conditioning system is most likely short cycling. An Air conditioning organisation may turn on and off repeatedly due to muddied, broken, or declining parts or for various other mechanical or electrical reasons.

The term short cycling refers to when an AC organization'southward cooling bike terminates prematurely but to turn on once more later a brusk time. Depending on indoor and outdoor weather condition, this could mean that your system turns on and off every v to ten minutes.

An air conditioner that is switching on and off repeatedly is bad for both homeowners and your Air-conditioning arrangement. It takes more ability to start your Ac over and over as opposed to when it'south running smoothly as information technology does in longer cycles. It also causes actress wear and tear on the mechanisms that piece of work to plough on your AC. This can dramatically increase your electric bill and result in more than repairs needed for your AC, so this is an issue you lot want to fix every bit soon as possible.

eleven Reasons Your Air conditioning Keeps Turning On and Off & How to Set It

Luckily, short cycling is normally an like shooting fish in a barrel fix! Acquire some of the most common reasons why your air conditioner keeps turning on and off and how you lot can stop your air conditioner from short cycling.

one. Thermostat Issues

Your problem may exist as elementary every bit your thermostat causing the curt cycling, so when your Air-conditioning system is short cycling, check the thermostat. While the thermostat may seem similar ane small component of your unabridged organisation, this device controls the temperature of your entire domicile, then information technology'south important that information technology functions properly.

If the thermostat is non sensing the temperature accurately and communicates misinformation, it will signal the ac organisation to start and stop frequently.

If you notice your thermostat screen is blank or fading it may be low on batteries and losing power intermittently. This will cause your Air-conditioning organization to turn on and off when your thermostat loses battery power.

Solution: Try replacing the batteries and restarting the thermostat. If neither solution fixes your problem, phone call an HVAC professional person to diagnose the thermostat.

2. Bad Thermostat Placement

Your thermostat measures the temperature of the air around information technology to determine when to plough your Air-conditioning system on and off. Your thermostat may have inaccurate readings if it's located:

Most a window and receiving straight sunlight
Close to a room that'due south ever hotter than the residue of the house, such every bit the kitchen or bathroom
Beneath supply air vents, receiving direct airflow

Any of these situations could cause your thermostat to receive inaccurate, poor readings and think your house is hotter or colder than it actually is.

Solution: Move your thermostat to a amend, more centralized location.

3. Dirty Air Filter

Clogged air filters are 1 of the most common causes of AC problems. A dirty air filter restricts airflow to your AC arrangement and can crusade multiple issues, including curt cycling.

Solution: Check and replace your air filters if they're muddy.

Related article: How Ofttimes Should I Change My Ac'due south Air Filter?

4. Muddied Condenser Coils

If your exterior Ac unit is turning on and off and you oasis't performed AC maintenance in a few years, it'due south possible your AC'south condenser coils are caked in dirt and debris. Condenser coils are located inside the outdoor Air-conditioning unit of measurement and release the heat from inside your home. If they're chock-full with likewise much dirt and grime, your AC arrangement could overheat and turn off oft.

Solution:Make clean your condenser coils or take a local HVAC visitor perform routine Air-conditioning maintenance.

5. Oversized Air Conditioner

Have you always had this trouble? Or did it only start recently when you installed a new Air-conditioning system?

A system that is also large won't have an advisable refrigerant cycle and will face numerous problems, like cooling your home likewise apace and and so turning off shortly afterwards it turns on. This might sound like a proficient matter, just in reality, your home is cooling unevenly and your Air conditioning will turn dorsum on once more sooner than it should demand to.

If your Air conditioning cycles on and off every x minutes, then an oversized air conditioner may exist the cause.

Not simply are these issues inconvenient, but they can cause bigger problems for your home, such every bit:

Higher energy bills: Turning your AC on and off repeatedly uses more free energy
More repairs:Not but does short cycling use more energy, merely information technology likewise puts more wear and tear on the parts in your Ac
Shorter lifespan: More than habiliment and tear ways the boilerplate life expectancy of your air conditioner will be shorter.

Solution: Employ an Ac sizing reckoner to approximate your organization size requirements or contact a local HVAC company for a 2nd opinion on the installation.

half-dozen. Refrigerant Leak

If your Air conditioning organisation has a refrigerant leak, your air conditioner could be also low on refrigerant. Refrigerant is a coolant that cycles through your AC system, arresting heat and cooling down the air within your domicile.

It's a mutual misconception that refrigerant is used up as part of an AC system's cooling procedure. Just the truth is low refrigerant levels are caused by pocket-size holes that permit the refrigerant to escape.

When your Air conditioning organisation is depression on refrigerant, the compressor will malfunction and shut off your compressor because the force per unit area is too low. And then, when your compressor is off, the force per unit area will ascent over again and information technology will turn back on. This creates a short bike that causes massive amounts of wear and tear on your AC system, potentially resulting in parts going bad or system failure.

Solution: Refrigerant leaks can exist unsafe, call a local HVAC visitor to find and fix the leak.

7. Compressor Failure

Merely like when there'due south a refrigerant leak, if your Ac compressor is overheating, malfunctioning, or starting to neglect, information technology will result in your AC system shutting off often and starting back up shortly.

If you notice your Air-conditioning compressor shut off afterwards 2-3 minutes of operation, then your Air conditioning compressor is most likely overheating or starting to fail.

Solution:Contact a local Ac repair company to diagnose and replace your AC compressor, if this role is not working properly it tin can crusade other parts to quickly degrade from increased habiliment and tear.

8. Frozen Evaporator Coils

If your AC system has airflow issues or a refrigerant leak, it's possible your evaporator coils are freezing up. When this happens, your Air conditioning organisation or sometimes merely your outside Air-conditioning unit will turn off until the water ice thaws and then turn on again.

Solution:Cheque your outdoor AC unit of measurement for ice buildup, if y'all've already checked your air filters, and so you likely have a refrigerant leak and will want to call a local HVAC company to find and gear up the leak.

Air Conditioner Turns On and Off Right Away

Is your ac system turning on and off right abroad, after only a few seconds or minutes of running? If your ac unit turns on and then off immediately then you virtually likely accept problems with the electrical components or the run capacitor.

ix. Electric Issues

Electrical problems are a common cause of curt cycling. Often, in that location may be an result with the electric supply line or the capacitor could be broken or declining, but your AC system could too accept an electric issue due to the thermostat, electrical connections anywhere in the system, or the excursion boards.

Solution: Call a local professional electrician. Electric problems are not only difficult to diagnose but diagnosing an electric problem can be dangerous for fifty-fifty the well-nigh knowledgeable homeowners.

10. Bad Run Capacitor

Your AC's run capacitor gives your Air conditioning system the initial boost of energy information technology needs to turn on and besides provides continuous power so your system tin continue running. When this part starts to go bad it can outcome in intermittent ability being supplied to your Air-conditioning, causing it to turn off unexpectedly so back on.

If your air conditioner starts then stops later on but a few seconds or your air conditioner turns off after thirty seconds, then chances are there'south a problem with your run capacitor and you will demand to supersede the office.

Solution:Contact a local HVAC company to diagnose and supplant your Ac capacitor, if this part is not working properly it can crusade other parts to quickly degrade from increased wear and tear.

11. Clogged Drain Line

Well-nigh AC systems have a safety featured called a float switch that volition turn off your system when water in the bleed line is not flowing properly and backs up. If you notice that even when you plow your thermostat to Auto the air does not circulate, and you take already ruled out thermostat and electric problems, and then this is most likely your issue.

Solution:Check out our guide: How to Unclog Your Ac Drain Line