Air Conditioner Not Cooling? Troubleshooting Tips

Before calling for service, it’s worth checking a few common issues that could be preventing your air conditioner from cooling properly. Many problems have simple fixes that you can take care of yourself, saving the time and expense of an unnecessary service call. Below are some quick steps homeowners in Mattoon and across East Central Illinois can try before scheduling an hvac repair.

1. Start with the thermostat

First, check your thermostat settings. Make sure it’s set to a temperature lower than the current room reading. The system mode should be on COOL (or AUTO if you want it to run only when needed). The fan can be set to ON for continuous circulation or AUTO if you’d like it to run only when the air conditioner cycles. Lowering the thermostat to its coldest setting is a good way to see if your AC system will turn on.

2. Check the air filter

One of the most common causes of weak or no cooling is a dirty filter. If the airflow from your vents feels low, inspect the filter. A clogged filter can block cool air and strain your system.

3. Look at vents and registers

Walk through your home and verify that all supply registers are open and clear of obstructions such as furniture, curtains, or rugs. Proper airflow is key to keeping your home comfortable.

4. Inspect the power switches

Both your indoor and outdoor AC units have a nearby power disconnect. Double-check that each one is switched on.

5. Check your breaker panel

Go to your home’s electrical panel and make sure the breakers for both the indoor and outdoor units are in the ON position. Reset any that may have tripped.

If you’ve worked through these troubleshooting steps and your air conditioner still isn’t cooling, it’s time to call a professional. The HVAC team at Atteberry & Marshall proudly serves homeowners near Mattoon, IL, and throughout East Central IL. We’ll make sure your system is back to running smoothly in not time.

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