When your air conditioner stops working, you want it to work again as soon as possible. That means that you need to call an AC repair company so that they can come and repair it for you. But you may not be able to get someone out to your house as soon as you would like, so you may want to do some troubleshooting to see if you can get the AC running again. Even if you can't get it working again, you have more information to give the service tech. The more info they have, the sooner they can get your AC back on.
AC Won't Turn Off
One problem you may have with your air conditioner is that it keeps running and doesn't get to the temperature that you set it at. This generally happens because the coils of your air conditioner have gotten frozen. They can freeze because the filter on your AC has gotten blocked with dirt, dust, or grime. One easy thing you can do to see if you can get the AC to reach the set temperature is to take the filters out of your AC and either replace it or clean it off. If the coils on your air conditioner have frozen over, then turn off your air conditioner until they melt and you can make sure that there isn't any build-up on them. Once that happens, turn your AC back on and let it run. See if the AC reaches the set point and turns off at that point. If not, there is some other issue and you need to wait for the professionals.
AC Blows Warm Air
You have your AC running because it is hot outside and you don't want the inside of your house to be hot. So, if your air conditioner is blowing warm air into your house, it kind of defeats the entire purpose of having an AC. There are a few things that can cause this. One of them is a malfunctioning condenser. If the evaporator coils on your condenser have broken, then the refrigerant may have leaked out or things may have gotten in, which would make it not work. Look at the condenser to see if it is frozen or if there is any visible damage.
If your AC stops working, you want to get it working again. You can do some troubleshooting to see if you can get it working again, or at least figure out what the problem may be.
Contact an AC repair technician to learn more.