Why Is My Heater Blowing Cold Air?

If your heater is blowing cold air, it can be incredibly frustrating and make for a chilly winter in Georgia.

At Precision Heating & Air, this is a common problem we’ve seen with furnaces in Atlanta. There are several possible causes for a furnace blowing cold air. Here are some of the main reasons your heater can start blowing cold air.

Reasons Your Heater is Blowing Cold Air

1. Your Thermostat

One of the common reasons your heater is blowing cold air is actually because of your thermostat. No matter what type of HVAC system you have, you should check your thermostat first. Check the thermostat batteries, check the fan switch, and make sure the temperature is high enough.

2. Overheated Furnace

In some cases, your furnace could be blowing cold air because it is overheating. If your furnace blows hot air, then cold air, and then stops blowing any air, this could be a possible sign that your furnace has overheated. If you suspect your furnace is overheating, it will start blowing cool air to lower the temperature to a safe level. A dirty furnace air filter is often the culprit of an overheating furnace. Try changing your furnace’s air filter to see if that does the trick.

3. Pilot Light is Out

If you have a gas furnace and it is blowing cold air, your pilot light may be out. You can try relighting the furnace pilot light. If it stays on, problem solved! If the pilot light refuses to light, ensure that gas is flowing into the furnace. Make sure the furnace’s gas valve is in the “on” position. If this doesn’t work, you may have a problem with the thermocouple which might require a professional’s touch to adjust it or replace it.

4. Damaged Ducts

If your ducts have small openings or cracks, they may pick up the cooler air that mixes with the warm air. If the ducts have heavy damage, they could lose the warm air altogether, causing your system to blow just the cold air.

5. Faulty Electronic Ignition

If you have a new furnace with an electronic ignition, your system may need adjustments. An experienced HVAC repair technician can help with this.

Turn to the Heating Repair Experts at Precision Heating & Air in Dallas, GA

Serving Acworth, Kennesaw, Marietta & Douglasville

Many of these furnace issues can be prevented with regularly-scheduled cleaning and maintenance. If you’re unsure why your furnace is blowing air, turn to the experts at Precision Heating & Air. Located in Dallas, Georgia, we’re conveniently located near Marietta, Acworth, Johns Creek, and the surrounding communities.

We’d be happy to inspect your heating system and pinpoint the specific cause, so you can enjoy a comfortable and cozy home this winter. Contact us to learn more about our heating services at 770-445-0870 or fill out our online form and we will reach out to you shortly.