Air Conditioning Repair Troubleshooting Guide
We’ve compiled a troubleshooting guide that some homeowners might feel comfortable using on their own. If your cooling system still won’t work after consulting this list, contact Diamond Blue Air at 469-200-3100 for reliable AC repair in Irving. We service all of DFW, including Carrollton and Grand Prairie.
Ready for the troubleshooting list? Follow this simple guide below as many of these air conditioning repair steps don’t require mechanical expertise.
1. Air Conditioner Won’t Turn On
There are a few common reasons why your central air conditioning system isn’t running. These reasons might be a switch turned to the wrong setting, a blown circuit, an incorrect thermostat setting, or a condensate pan that simply needs to be drained. Let’s get into these.
Blown Circuit Breaker
The AC unit won’t come on if you have a tripped breaker. You don’t want to call an HVAC contractor out just to flip this back for you.
Head to the house’s main electrical panel to see if it’s tripped. Most are familiar with this, but if not, it’s a metal box mounted to the wall. It’s often in the garage or a closet since most Irving homes do not have basements.
Don’t forget to make sure your hands and feet are dry before touching the panel or breakers.
Find the one labeled “AC” and double-check that it’s in the “on” position. If not, the breaker will be in the middle or “off” position.
To fix this, just shift the breaker back to the “on” position.
If it trips again, leave it alone and give us a call at 469-200-3100. A breaker that is repeatedly tripping could mean there is a larger electrical problem related to the HVAC system.
Incorrect Thermostat Settings
If the thermostat isn’t signaling your AC to run it won’t be able to turn on. The most important step is to ensure it’s not set to “heat” during the Summer season.
If you’re using a digital programmable thermostat:
Install new batteries if the screen is dark. If the symbols are incorrect or scrambled, the thermostat will need to be replaced.
Make sure it’s set to the correct program. Override it by lowering the temperature and pressing “hold” if you can’t change the program. This will force the AC to start even if the programming is incorrect.
Set the thermostat to a temperature cooler than the current temperature reading. If it’s the same temperature, the AC won’t start.
Once the thermostat is using the correct settings, the cool air should start flowing very quickly if this is the problem.
If you’re using a smart thermostat like Nest, Ecobee, Lux, Honeywell or Bosch, take a look at the manufacturer’s website. If you’re still having trouble, give us a call at 469-200-3100 for help.
Turned Off Switch
The AC most likely has a shutoff switch near the outside unit. This switch is usually inside a metal box mounted to the outside of your home. If the unit has been recently serviced, the switch may still be set to the “off” position and will need to be switched back.
Clogged Condensate Drain Pan
The drain pans collect the excess moisture your system removes from the air. It’s located either under or inside your furnace or air handler.
If there’s a blockage or clog, water can build pressure and trigger a safety feature. This will turn off the system.
If the pan has a PVC pipe or drain, clear the excess water with a special cleaning tablet. You can find these tablets at home improvement or hardware stores. You can also soak it up with an old towel.
If the pan has a pump, you’ll need to locate the float switch. If the switch is set to “up” and liquid has collected in the pan, the pump might need to be replaced.
Tried All These Ideas, and Still Not Sure?
Call us at 469-200-3100 and we’ll figure it out, fast.