3 Common Reasons Your AC Won’t Turn On

woman in front of fan trying to cool down

The last thing you want is to get back home and find that it’s too hot inside because your AC won’t turn on. Temperatures can get out of control sometimes, especially during the warmer months, and the only way to ensure the indoor air is comfortable is to run your AC a lot.‏

‏It’s never fun to wait for your AC to get fixed while the temperature rises inside your home. So if you find that your AC won’t turn on, in most cases, all you need to do is call the professionals and get it fixed. When they arrive to inspect your HVAC system, they may say the problem lies in one of these reasons. 

‏Faulty Control Board‏

‏A lot of modern air conditioners come with a component known as a control board or PCB assembly. This unit works to regulate the several small elements that make up your air conditioning unit. If the control board is faulty, your air conditioner might not turn on.‏ Since this component performs many functions, it’s generally not advisable to try and fix it on your own. You might end up worsening the situation and damaging the air conditioner further. As such, whenever you suspect that it might be something to do with the control board, it’s best to call the professionals to take a look at your unit. ‏

‏Clogged Air Filter‏

‏Changing out the air filter can be just one more annoying homeowner task. However, if you don’t clean your AC’s air filter per the manufacturer’s recommendation, it will accumulate dirt over time. If that goes on long enough, it can become so dirty and clogged with dust that it could cut off airflow to your AC.‏

‏When your air conditioner is functioning as it should, it absorbs humidity from your home. Some of the water will then condense and fall into a condensation tray that has drain lines, which let water flow outside. But when the air filter is clogged, the water will freeze, and you’ll end up with ice on the coil and‏ ‏other components‏. As a result, the AC won’t be able to cool properly. ‏

‏Here are more reasons why the AC coil might freeze up:‏

● ‏Blockage of the supply vents‏

● ‏Improper refrigerant charge‏

● ‏Refrigerant leaks‏

● ‏Obstructed return vents‏

‏Temperature Control Issues‏

‏If your AC doesn’t seem to be cooling in your home or office, then the temperature control unit might be to blame. Your air conditioner’s temperature is usually controlled by a sensor that monitors the heat levels in the room. If there’s a faulty connection between the sensor and the electrical unit, your air conditioner won’t bring down the temperature. ‏

‏The temperature sensor is the equivalent of an air conditioner’s brain. The same way your brain sends impulses to your body to modulate several processes is the same way your temperature sensor’s connection is vital for your AC to operate. For any issues related to your AC sensor or temperature control, you must call an air conditioner repair company immediately.

Your HVAC system is an expensive part of your home, and it’s best not to leave problems alone. Minor problems often turn into bigger ones when they’re ignored, and you’ll save yourself time, money, and a lot of stress if you fix problems when they’re small. If you notice something is going on with your heating and cooling system, call in your local HVAC company. If you don’t have one, it’s important to find one and establish a good relationship with them. That way, if something does go wrong, you have someone you already know and trust to give you an honest assessment and fair price. 

‏Keep Your Air Conditioner Running Efficiently All Year Round‏

‏The best way to ensure you don’t end up with an AC that won’t turn on is to have it regularly serviced and maintained. Regular visits from an HVAC technician can help you catch small issues that you probably didn’t even know about, and maintenance just might save you hundreds (or thousands!) down the line. If you want to avoid major costs later on, don’t fall into the habit of waiting for something to go wrong before you call the professionals. ‏

‏AC not turning on? HVAC system not running right? Our team is here to help! Get in touch with us today to schedule an appointment. At Larry’s Heating & Cooling, we provide AC repair to those in Yankton, Vermillion, and the surrounding SD communities.

Leave a Replay


For over 30 years we have proudly been serving the Yankton SD area and surrounding communities with reliable heating and cooling services! 24/7 services!

Recent Posts

Follow Us

Sign up for our Newsletter