Reasons Why Your Furnace Blowing Cold Air

• The furnace is no warmed up

When you initially switch on your furnace, you may feel a rush of cold air but wait a few minutes to observe whether the air finally warms up.

Initially, cool air should come out of the vents as the furnace has to warm up. It’s the same as turning on a hot water faucet only to receive chilly water initially.

• Incorrect fan settings

Verify that the fan is turned “ON”. If it is, it will continue to blow air whether or not the furnace generates heat. A problem with the fan setting is probably at blame if your furnace constantly blows air that is alternately hot and cold.

• The Pilot light may be out.

A pilot light is a tiny gas lamp that continuously burns to start a bigger burner, such as a furnace. However, this light may go off if there is a dirty valve or a broken thermocouple.

• Fuel Supply

Your heating system depends greatly on the availability of fuel to generate heat. If something reduces or restricts that supply, your furnace won’t run continuously and will release cold air. It often occurs if the pilot light is out or malfunctioning, which prevents gasoline from getting to the ignition chamber. Alternatively, your gasoline tank can be empty, or the gas entrance valve might be broken.

• Clogged condensate line

A condensate pipe is present in every high-efficiency gas furnace. This line enables extra water produced by the furnace to drain from the appliance.
Water will back up if debris or dirt obstructs the line. That will either interfere with or harm the furnace or cause a shut-off safety switch to be activated. The furnace might not ignite in either scenario. It will blow cold air before shutting off.

• Clogged air filters

Dirty air filters can result in various problems as they restrict airflow into your furnace. Due to restricted airflow, your furnace may need to run longer to heat your house until it overheats. You will only get cold air after it reaches an overheated state.

In this case, replacing your dirty air filter with a clean one is the solution to the problem. You can look for a heating replacement in Weirton, WV. Because of this, your furnace will be less prone to overheat and should operate normally once the airflow blockage is gone.