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Three Reasons Why Your Furnace Blows Cold Air

by B.Annie on March 20, 2017

Why is my furnace blowing cold air?

We get these call dozens of times a day.  The truth is there are a number of reasons.  The good news it may be nothing.  It might actually be as simple as flipping a switch.  If it is we know you would rather not pay us.  So, try these three steps first.

Three Reasons Your Furnace Blows Cold Air

  • Your Fan Is On  – The first thing our technician will do when he gets to your house is look at your thermostat.  We will let you in on a little secret.  This is not rocket science. He is looking for the simplest explanation.  Is your fan set to on?  If so, the fan will blow even when the furnace is not heating the air and you will feel cold air being blown around.  Flip the switch and the problem goes away.  See, we told you it was easy.
  • Overheating – Your air filter does serve a purpose. It filters the air that flows through your system.  Unfortunately, if you do not change it often enough, it can cause your system to overheat.  A sure sign of this problem is that sometimes your furnace blows warm air, sometimes cold, then suddenly it doesn’t blow at all.  Try changing the air filter.  This may fix it.  However, keep in mind, this shouldn’t happen over and over again.  It could cause a much more expensive problem down the road.
  • Pilot Light Is Out – If your furnace is only blowing cold air, there is a good chance your pilot light is out.  Try relighting it.  If it stays on you are good to go.  If it is refusing to light, check that the gas valve switch in on. If it is on, check to see it the pilot light is dirty. Clean it so that the gas can come through.

If none of these solutions work for you then it’s time to call in the professionals.  Let us help you get up and running again.