Why is My Furnace Blowing Cold Air?

January 28, 2015

Are you dealing with a situation where your furnace is turning on but your house doesn’t feel very warm? If you feel the air, you may find that it isn’t very warm. So why is this happening? Here are some of the common reasons a furnace may be blowing cold air. In some cases, you may be able to fix the issue yourself. In other instances, you’ll need to call for help from a technician. Peters Heating and Cooling offers HVAC service Troy residents can count on for all of their heating issues.

• Something is wrong with the fuel source: Fuel is the main source of heat for any furnace. Depending on what type of furnace you have, if you aren’t getting warm air check your fuel source whether that’s your electrical panel or the gas supply valve. If there is something wrong with your ignition system or gas valve, you’ll need a professional to help you fix it.
• Your filter is really clogged: Whenever you have a heating issue it’s a good idea to just change the filter, especially if you haven’t done so in a while. A clogged heater can restrict air flow making it harder for your heater to heat your house.
• Your condensate drain is clogged: Condensate pumps and reservoirs can become clogged which may prevent the burner from lighting.
• Something is wrong with your ductwork: If you have damaged ductwork either in the form of a leak or an obstruction, it will block air from getting to your home. If you have a leak, a lot of the air may be going into your attic meaning very little will be coming in the house. You may be able to do a quick inspection of your ductwork to see if this is the issue. However if it is just a small leak or an obstruction, you may not be able to spot it yourself.
• Your system needs a reboot: If you have a new, modern furnace that is controlled by a computer it can freeze much like a computer does. This may impact fuel delivery while still allowing the fan to work. Try rebooting the system to see if that helps.