Nothing is worse than a furnace that isn’t blowing warm air during the winter months. If this is happening to you, you are going to want to find out why as soon as possible. When it comes to this issue, there could be several reasons why you’re experiencing it. Some issues are easy to fix and can be done on your own, while others might require the help of a professional. Absolute P&M Services is here to walk you through some of the possible causes of a furnace that is all of a sudden blowing cold air rather than warm.
Why is My Heat On But Cold Air Blows Out?
Furnace problems aren’t something than any homeowner wants to deal with. Following are some of the most common causes for a furnace blowing cold air:
– Thermostat Settings: If you feel cold air coming out of your vents, you should first check your thermostat. Make sure it is set to the heat setting. This is the easiest fix if it somehow got bumped or the heat got shut off.
– Air Filter: You should next check the filter to see if there is a need for changing it. You should be changing the filter regularly since a dirty filter can lead to a number of different issues like cold air blowing out the vents. Your furnace needs to have proper air ventilation to work properly.
– Condensate Drain: There is a certain amount of liquid that is constantly draining from your furnace during operation. This liquid drains away through the condensate drain. If that line is clogged, it can lead to cold air and leaking water. Make sure there is no water pooling up around your furnace.
– Pilot Light: Many modern furnaces don’t have a pilot light like older models do. However, if yours does have a pilot light, make sure it hasn’t gone out for some reason. It won’t stay lit if there is no gas to burn. There could also be other malfunctions that are keeping the pilot light from working like it should.
– Dirty Flame Sensor: There is a safety feature on your furnace called the flame sensor. It is important that it detects a flame to ensure there isn’t a buildup of gas. This sensor can get grimy with time and needs to be cleaned. If it isn’t able to sense the flame, the furnace won’t be able to heat your home.
– Cracked Heat Exchanger: If you have a cracked heat exchanger, it can not only lead to cold air blowing from the vents, but it will leave you with a carbon monoxide risk as well. This happens as the furnace gets older and the metal is weaker from contracting and expanding so much.