Furnace Blowing Cold Air 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.

Furnace blowing cold air no heat.

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. Other causes of furnaces blowing cold air pilot light ignition problem. Your gas supply could be turned off. 3 pilot light is out if your gas furnace is only.

Most furnaces also have a reset button that clears any issues that might cause the furnace to produce 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. Ensure that your thermostat is set higher than the temperature in your home. 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. Is the furnace s blower constantly running. Have an expert inspect your ducts along with the furnace. Your furnace may be blowing cold air because the filter is too dirty.

Set the thermostat to heat and. A furnace blowing cold air could be due to your thermostat. 2 furnace overheated let s say your furnace blows hot air then cold air but then stops blowing any air at all after a. Again using occam s razor we can assume that the next likely culprit for your heater blowing cold air is your thermostat.

7 reasons your heater blows cold air ac blows hot air 1 dead batteries in thermostat. If you haven t been regularly checking and changing your air filter it s most likely extremely clogged. Check the thermostat and ensure it is set properly. A dirty air filter blocks airflow over the furnace s heat exchanger causing it to overheat.

To troubleshoot a misbehaving gas furnace start with the easiest explanations and solutions then work your way to the most complicated. A clogged filter will restrict air flow into your home. You might not think your filter contributes to your ac not blowing cold air but it does. When overheating your furnace can trip a high limit switch causing the furnace burners to shut off so that the heat exchanger does not crack.

For a heat pump or heater to produce warm air air must flow easily through the filter. Otherwise your electric heater or gas furnace will not turn on.