Written on: August 12, 2024

Why Isn’t My Central Air Blowing Cold Air?

A little troubleshooting might get the cool air flowing again.

To put it mildly, this summer has been a real scorcher. We’ve endured multiple days with temperatures over 90 degrees in Stony Brook and throughout Suffolk County. And the summer is far from over!

Every day, Swezey Fuel responds to emergency calls from homeowners whose central air conditioning has gone out of commission. On the sweltering summer days we’ve been enduring, this can be more than uncomfortable. It can be unsafe.

The Swezey team is always committed to showing up for customers who need help getting their home cooling system back online. That said, you can often fix A/C issues yourself with a bit of troubleshooting. If your central cooling system isn’t blowing cold air, try these steps to resolve the issue. You might save yourself the cost of a professional A/C repair (and free up our technicians to answer other calls).

1. Check your thermostat.

The problem of cold air not blowing from a central A/C system can sometimes be a simple thermostat setting. Confirm that your thermostat is working; it might need new batteries or have a wiring issue. If it is on, make sure the system is set to the “air conditioning” or “cool” position or turned to “fan.” Also, confirm that the thermostat is at least five degrees below room temperature.

2. Look at your breakers or fuses.

If adjusting the thermostat doesn’t work, there could be a power supply problem. Go to your home’s electrical panel or fuse box. Make sure the circuit feeding power to your central A/C isn’t tripped or blown.

3. Go to your system’s power switch.

Now that you know the system’s breaker or fuse is okay, look at the disconnect switch in the box next to your A/C system’s outdoor condenser. Is it set to on?

4. Check obstructions to your system’s airflow.

If all your central A/C equipment seems to be working, but you still aren’t getting cool air in your rooms, the issue could be some form of obstruction to your airflow.
Check for the following common airflow issues:

• Make sure your rooms’ vents are open and not blocked by furniture, plants or area rugs.
• Check your HVAC system’s air filter. We suggest you do this once a month during the peak heating and cooling seasons. If the filter is dirty or clogged, clean or replace it according to your system’s specifications.
• Take a look at your outdoor condenser and make sure it isn’t clogged with plant life or debris. As a general rule, your outdoor A/C unit should have 18 to 30 inches of clear space around it so it can “breathe.”

Is it time for an A/C service visit from Swezey Fuel?

If none of these DIY fixes solved your cooling problem, then there could be a mechanical, electrical, refrigerant-related or other problem that requires a professional technician to fix. Our team is available around the clock to address HVAC emergencies. And if your system is at the end of its service life, we can even set you up with new, high-efficiency central A/C equipment.

Our team of attentive A/C technicians is at your service. Contact Swezey Fuel to arrange a maintenance appointment.