Furnace blows cold air, then hot
- heat is on but blowing cool air
- heat is on but blowing cold air in winter
- heat is on but blowing cold air car
- heat is turned on but blowing cold air
Electric heater blowing cold air in house.
Why Is Cold Air Blowing Out Of Vents When The Heat Is On?
When you come home on a chilly day, the last thing you want is to be met with is a gust of cold air blowing out of your vents when the heat is on.
This unpleasant surprise is common, unfortunately, and can make uncomfortably cold weather that much more difficult to handle. Thankfully, there are a few common causes of this issue that can help you identify a solution.
Your Air Filter Is Dirty
Did changing your air filters slip your mind?
What do i do if my heater is blowing cold air
Clogged air filters could be causing cold air to blow out of your vents. A dirty air filter can block airflow over your furnace’s heat exchanger, which can cause it to overheat. Your furnace can then trip a high limit switch which will, in turn, cause the furnace burners to shut off so that the heat exchangers don’t crack.
Your Pilot Light Is Out
If you have an older furnace with a pilot light and that pilot light is not lit, your burners will not light either, which means there is no heat source.
Your furnace will have a label on it with directions on how to relight your pilot lig
- heat is on but vents blowing cold air
- heat pump is on but blowing cold air