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Reasons Why Your Air Conditioner Stopped Working


If your air conditioner stops working, the first thing you should do is check the thermostat to make sure it's set to "cool." If it is and there's still no air coming out of the vents, then it's time to call an HVAC technician. Some things can cause your AC to stop working, including a low refrigerant level or a malfunctioning circuit breaker. Here are some common problems with ACs and solutions for fixing them:

Thermostat Malfunction

Your thermostat is the brain of your air conditioner, and it controls how much cool air your system pumps out. If it's not working properly, your system might not be able to turn on or off as needed.

When you hear that familiar hum from a faulty thermostat, you'll know it's time to replace it with one from Lowe’s or another hardware store.

Leak in Your AC System

  • If you notice your AC is leaking water, it could be caused by a leak in one of the components of your HVAC system.

  • The first step to take is to check the refrigerant level in your system. If it's low and you need more, talk with a professional about what kind of refrigerant you should use and how much you'll need.

  • Your compressor may also be leaking or even broken if there are any visible holes in it. A licensed technician can help determine whether this is the case and fix any issues that arise from it.

  • Check the condenser coil for leaks as well; if there are none present there but they're present somewhere else along your system—like inside an insulation sleeve around pipes or wires—the cause may be due to leaking coolant that came out during installation but hasn't been cleaned up since then yet!

Low Levels of Refrigerant

Your air conditioner has stopped working and it’s time to get to the bottom of the problem. There are a few things that could be causing this issue:

  • Low levels of refrigerant

  • A high-pressure switch is not functioning properly

  • A low-pressure switch is malfunctioning

  • The evaporator coil is frozen over and no longer able to cool incoming air

  • The evaporator fan motor not working

Circuit Breaker Tripped

If your circuit breaker has tripped, you'll need to reset it and check to see if your AC starts working. You can do this with a few simple steps. First, flip off the main power switch for your home or building and wait for 30 seconds before flipping it back on. Then try turning on your air conditioner again by pressing the "On" button on the thermostat or remote control. If that doesn't work, you'll want to call a professional because there may be an internal problem with your unit that requires repair or replacement of parts.

Evaporator Coil is Frozen

If your air conditioner is having issues, it's a good idea to check the evaporator coil. The evaporator coil is located in the air handler and can be found on top of the furnace. It's made of copper tubing with aluminum fins and looks like an upside-down car radiator. This can be easily checked by watching your home while it heats up or cools down. If water starts coming out from underneath or inside your unit, this may mean that there's something wrong with your evaporator coils.

The best way to repair this issue is by replacing them altogether, but if you don't have time for that, try using an ice pack to help slow down any damage caused by freezing temperatures (be careful about placing ice near electrical components).

Clogged Condensate Drain

If you've had this problem, it's most likely that your condensate drain is clogged. The easiest way to check if this is the case is to take a look at the drain pipe from your air conditioner. If it looks like something you would use for a science experiment (and not in a good way), then you can be sure that things are growing in there.

To clear out whatever has been causing your air conditioner problems, remove all of the debris from the inside of the drainpipe and place a bucket under it so that any water released during draining does not overflow onto floors or cabinets below.

Air conditioning repairs

  • Check the thermostat.

  • Check the circuit breaker.

  • Check the condensate drain.

  • Look at the evaporator coil, which is located on top of your furnace or heat pump. If it is dirty, clean it with a soft brush and vacuum off excess dust and dirt before inspecting for damage to see if there are any signs of corrosion or dents in it from being knocked around during installation (or anywhere else).

  • Find out whether or not you need to recharge your refrigerant levels by checking with an expert technician like this air conditioning repairs in Mackay at one of our air conditioning repair services or by performing this test yourself using a digital tire pressure gauge: Disconnect power from the unit and open valves on suction line (located behind indoor coil). Using a digital tire pressure gauge, place the tip over the valve opening until the gauge reads zero; record the reading; repeat the process with lines from the outdoor compressor until readings are equalized; record the final reading. The difference between the final reading and the initial reading should be no more than 1 pound per square inch (psi) for R22 units, 2 psi for R410a/R407C


If you’re having trouble with your air conditioner, you must call a professional. Not only is it a more cost-effective option than replacing your HVAC system, but fixing the problem yourself could end up costing you more money in the long run. If you have any questions about AC repair or maintenance services, contact us today!

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