Furnace Blowing Cold Air No Heat

Ensure that your thermostat is set higher than the temperature in your home.

Furnace blowing cold air no heat.

A furnace blowing cold air could be due to your thermostat. 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. Set the thermostat to heat and. A clogged filter will restrict air flow into your home.

Most furnaces also have a reset button that clears any issues that might cause the furnace to produce no heat. Other causes of furnaces blowing cold air pilot light ignition problem. 7 reasons your heater blows cold air ac blows hot air 1 dead batteries in thermostat. Your furnace may be blowing cold air because the filter is too dirty.

Otherwise your electric heater or gas furnace will not turn on. 2 clogged air filter. Or the gas line isn t supplying enough gas to your furnace. Check the thermostat and ensure it is set properly.

Have an expert inspect your ducts along with the furnace. Your gas supply could be turned off. 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.

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. Is the furnace s blower constantly running. 2 furnace overheated let s say your furnace blows hot air then cold air but then stops blowing any air at all after a. 1 thermostat is set to on is your furnace blowing cold air only sometimes.

For a heat pump or heater to produce warm air air must flow easily through the filter. Seems silly but you d be surprised how often this has happened. 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.

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. 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.