Furnace Blowing Cold Air No Heat

2 furnace overheated let s say your furnace blows hot air then cold air but then stops blowing any air at all after a.

Furnace blowing cold air no heat.

Other causes of furnaces blowing cold air pilot light ignition problem. Otherwise your electric heater or gas furnace will not turn on. 7 reasons your heater blows cold air ac blows hot air 1 dead batteries in thermostat. A furnace blowing cold air could be due to your thermostat.

Set the thermostat to heat and. Have an expert inspect your ducts along with the furnace. Seems silly but you d be surprised how often this has happened. 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.

Your gas supply could be turned off. To troubleshoot a misbehaving gas furnace start with the easiest explanations and solutions then work your way to the most complicated. A dirty air filter blocks airflow over the furnace s heat exchanger causing it to overheat. For a heat pump or heater to produce warm air air must flow easily through the filter.

1 thermostat is set to on is your furnace blowing cold air only sometimes. You might not think your filter contributes to your ac not blowing cold air but it does. Or the gas line isn t supplying enough gas to your furnace. Ensure that your thermostat is set higher than the temperature in your home.

Check the thermostat and ensure it is set properly. 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. If your furnace seems to be blowing cold air it could be a problem with the ignition.

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. Your furnace may be blowing cold air because the filter is too dirty. Is the furnace s blower constantly running. Most furnaces also have a reset button that clears any issues that might cause the furnace to produce no heat.

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. A clogged filter will restrict air flow into your home.