Things are starting to get nice and chilly here in the St. Louis area, so when you come home and realize your furnace is blowing cold air, it can be a very frustrating experience. Many things can cause your furnace to blow out icy air rather than the nice warm air your home needs. Sometimes there is a very easy solution, but other times it can be a bit more complicated. So, let’s take a look at what problems you can tackle yourself, and what problems should be fixed by professionals.
Check The Thermostat
We know it may sound like a no-brainer, but making sure to check the thermostat to ensure you have your HVAC system on the right setting may be the solution you need. It can be surprisingly easy to accidentally set your system to cool, when you actually want it to be heating. You should also check to make sure your system is set to Auto rather than On. When the system is set to Auto it automatically turns your system’s blower on when the heat kicks in.
If you have the blower set to On, it will continually blow air out of your ducts even if it is not currently being heated by your furnace. The movement of the air out your ductwork can make the room temperature air feel colder than the air in your home. So while it may feel like your furnace is blowing cold air, it is actually just blowing room temperature air.
Dirty Air Filter
Changing a dirty air filter is one of the simplest things you can do to ensure your furnace runs smoothly. If you have a dirty air filter, it can restrict the airflow into your furnace. If the airflow is restricted too much, a safety mechanism will shut off the burners in order to prevent your furnace from overheating. Making sure your air filters are not clogged is very important. Repeatedly overheating your furnace can cause expensive repairs on your HVAC system.
Pilot Light Is Out
If the pilot light in your furnace goes out, it cannot ignite the fuel your furnace needs to heat your home. Some homeowners feel comfortable relighting their pilot lights. However, if you don’t know how or don’t feel comfortable, seeking out a professional for help is a great option.
Many new high efficiency furnaces have condensate lines which help remove water created during the heating process. When this line gets clogged it can cause your system to turn on a safety mechanism. That mechanism will prevent your furnace from igniting. Clearing a clogged condensate may just be the solution you need.
Call A Professional
Many other issues can cause your furnace to go out, and most of them should be diagnosed by a professional. If your furnace is blowing cold air, give us a call at (636) 887-2800, and we can help get your HVAC system back up and running!