Furnace Blowing Cold Air No Heat

Your furnace blowing cold air could be caused by hot air escaping through holes in the duct work that carries the heat throughout your building.

Furnace blowing cold air no heat.

7 reasons your heater blows cold air ac blows hot air 1 dead batteries in thermostat. Your gas supply could be turned off. Otherwise your electric heater or gas furnace will not turn on. Set the thermostat to heat and.

If your gas furnace is blowing cold air a number of factors could be to blame many of which you can address on your own without the immediate help of a service professional. A clogged filter will restrict air flow into your home. Other causes of furnaces blowing cold air pilot light ignition problem. 1 thermostat is set to on is your furnace blowing cold air only sometimes.

Or the gas line isn t supplying enough gas to your furnace. Have an expert inspect your ducts along with the furnace. For a heat pump or heater to produce warm air air must flow easily through the filter. 2 furnace overheated let s say your furnace blows hot air then cold air but then stops blowing any air at all after a.

2 clogged air filter. You might not think your filter contributes to your ac not blowing cold air but it does. If your furnace seems to be blowing cold air it could be a problem with the ignition. A dirty air filter blocks airflow over the furnace s heat exchanger causing it to overheat.

3 pilot light is out if your gas furnace is only. If you haven t been regularly checking and changing your air filter it s most likely extremely clogged. Again using occam s razor we can assume that the next likely culprit for your heater blowing cold air is your thermostat. A furnace blowing cold air could be due to your thermostat.

Is the furnace s blower constantly running. After ruling out all of the simple problems above the most likely cause of a furnace not blowing air is a problem with the blower fan itself which if you remember is the fan that circulates your house s air over the heated coils. Your furnace may be blowing cold air because the filter is too dirty. To troubleshoot a misbehaving gas furnace start with the easiest explanations and solutions then work your way to the most complicated.

Seems silly but you d be surprised how often this has happened. Ensure that your thermostat is set higher than the temperature in your home.