Furnace Blowing Cold Air No Heat

A furnace blowing cold air could be due to your thermostat.

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. Seems silly but you d be surprised how often this has happened. Again using occam s razor we can assume that the next likely culprit for your heater blowing cold air is your thermostat. A dirty air filter blocks airflow over the furnace s heat exchanger causing it to overheat.

Other causes of furnaces blowing cold air pilot light ignition problem. Have an expert inspect your ducts along with the furnace. You might not think your filter contributes to your ac not blowing cold air but it does. For a heat pump or heater to produce warm air air must flow easily through the filter.

A clogged filter will restrict air flow into your home. Or the gas line isn t supplying enough gas to your furnace. 1 thermostat is set to on is your furnace blowing cold air only sometimes. Ensure that your thermostat is set higher than the temperature in your home.

Set the thermostat to heat and. Your gas supply could be turned off. 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. If your furnace seems to be blowing cold air it could be a problem with the ignition.

If you haven t been regularly checking and changing your air filter it s most likely extremely clogged. 7 reasons your heater blows cold air ac blows hot air 1 dead batteries in thermostat. Otherwise your electric heater or gas furnace will not turn on. Check the thermostat and ensure it is set properly.

Is the furnace s blower constantly running. 3 pilot light is out if your gas furnace is only. 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. To troubleshoot a misbehaving gas furnace start with the easiest explanations and solutions then work your way to the most complicated.

Your furnace may be blowing cold air because the filter is too dirty. 2 clogged air filter.