A hot house in the hot summer doesn't let you have any relief from the brutal weather. Air conditioners fight against that and keep your house cool. You can get cool down and just get some relief from the high temperatures outside. This is why, when your AC stops working all of a sudden, you want it to get back up and running quickly. The best thing you can do is to call an air conditioner repair company to have them check out your AC system and get it running again. There are things that you can check that will help to narrow down what the problem is, which can help the service tech get straight to the problem.
AC Running All the Time/Not Turning On
It may not seem like these two problems would have anything in common, but there is one thing that can cause both problems, and that is a faulty thermostat. If your air conditioner doesn't turn on, it can be because your thermostat isn't recognizing the temperature change, so doesn't trigger the unit to turn on. One way you can check this is to look and see if the thermostat is set to AC. Then you can turn the thermostat down as far as it will go. It may take the thermostat and air conditioner a minute or two to catch up with the resetting of the thermostat. If it turns on, then the odds are that you need a new thermostat or the one you have needs readjusted. If your AC is running all the time, try turning the thermostat to a warmer setting and see what that does.
Frozen Evaporator Coil
The evaporator coil of your air conditioner lives in the outside unit for your air conditioner. Its job is to absorb the heat from the coolant and then disperse it out and away from the unit. The coolant needs to have that heat absorbed so that it can go back through the system and cool your house down. If the evaporator coil freezes up, then it can't do its job. It builds up ice because it isn't getting enough air to do its job, so you need to clean the unit off so that it can get enough air to evaporate the hot coolant into gas to cool it down.
If your house is almost as hot as outside, you need to get your air conditioner worked on. Find a good HVAC company that can send a service tech out to your house so that they can check over your air conditioner and get it cooling again.
For more information on how to troubleshoot your air conditioning, contact a professional near you.