Why Is My Air Conditioner Not Cooling

AC is crucial in Las Vegas. When it’s not doing its job, it leaves you uncomfortable in your own home—even if it’s still “running” and the air isn’t cool enough. In this article we’ll show you steps you can take to diagnose your AC problem yourself, and when to call a professional.
The answer depends on what exactly you’re experiencing. For example:

  • Your AC comes on but the air isn’t cool enough (or is even hot), or
  • Your AC will not come on at all

We’ll address each one below.

What should I do if my AC is on, but the air isn’t cool?

The first thing to do is make sure the thermostat hasn’t been accidentally changed to “heat” or “fan” instead of AC. If so, changing it back should fix the problem. Likewise, check all the vents to make sure they’re open.
Unfortunately, the problem isn’t always that simple. Here are other things you can check:

  1. Change the air filter. If the filter was dirty you may notice an improvement right away.
  2. Go outside and look at the compressor unit. This is the big part outside that most people think of as the AC unit itself. Check around visually to see if anything is blocking or obstructing it—including bushes, vines or debris. These can block air intake, reducing the efficiency of your unit.
  3. Clean the unit. If you see dust or dirt on the housing, on the compressor, or on the evaporator coils—the thin metal ridges inside the unit—this is probably the cause of your problem. You can gently clean them using whichever cleaning chemicals your manual recommends, usually diluted in water. Gently use a brush to work any stubborn dirt off the coils. Be sure to follow all safety instructions in the manual. The unit will need to be turned off, with the power shut off before you do this.

If you follow these steps and you still don’t get cold air, the problem is probably with the unit itself. The most common causes are either a refrigerant leak or a failing (or completely burnt out) compressor unit. Both of these issues cause declining AC performance over time, and eventually total AC failure. The air from your central AC will be less and less cool as performance declines.
Fortunately, these are also fairly standard fixes. Contact a licensed AC professional. They should be able to confirm the cause of the problem and replace the part or recharge the refrigerant, often the same day you call.

What should I do if my AC won’t come on at all?

If your AC won’t come on at all, you should start with a few simple steps:

  1. Make sure the thermostat is set to “cool”and the temperature is set lower than your current room temperature
  2. If that doesn’t work,try replacing the batteries on your thermostat
  3. If you still get nothing, check the circuit breaker box and look for any circuits that have been tripped. A tripped circuit may mean your AC isn’t getting any power at all. If so, reset the circuit and then try your AC.
  4. Check for AC Freeze. Some older units might not be able to handle the heat. If you see ice on the unit, turn it off and put the fan to on. Wait a few hours and this should start to defrost the unit. Once it is defrosted, try to turn it back on and see if you get cool air. If so, run it at a higher temperature. You may be over burdening it to keep the home too cool compared to the hot outdoor Las Vegas heat.

If none of these work, the problem is likely a faulty component that needs to be replaced. Call a professional and they should be able to help you diagnose your problem. Many repairs are fairly inexpensive and can be completed the same day you call.

Get Your Las Vegas Air Conditioning Unit Fixed Today

An air conditioner that doesn’t cool your house isn’t much of an air conditioner at all. Let our experts help you. At Ambient Edge, we offer fast repair calls, NATE-certified technicians, flat rate estimates and the best service in Las Vegas. 24/7 emergency repairs available. Don’t settle for a less experienced company—call us at (702)948-7201 or fill out the form to your right and speak with one of our service experts today.

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