3 pilot light is out if your gas furnace is only.
Furnace blowing out cold air heat.
If you only feel your furnace blowing cold air briefly and the air is quickly replaced by warm air this is the most likely explanation.
Have an expert inspect your ducts along with the furnace.
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.
If your furnace seems to be blowing cold air it could be a problem with the ignition system.
Again using occam s razor we can assume that the next likely culprit for your heater blowing cold air is your thermostat.
When a heating cycle begins and your air handler turns on that cool air will blow out of your registers before warm air does.
Try relighting the pilot light following these steps.
7 reasons your heater blows cold air ac blows hot air 1 dead batteries in thermostat.
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.
If you notice your furnace only blows cold air on occasion but your home is still maintaining its temperature than this may be simply a setting on your thermostat.
Turn the knob to off and wait 3 5.
2 clogged air filter.
One of the most common causes of a furnace blowing cold air is not actually a repair at all.
Otherwise your electric heater or gas furnace will not turn on.
Basically the furnace isn t lighting the fuel meaning it can t heat your home either.
Find the furnace s pilot light assembly and reset switch the assembly and switch should be near the bottom of.
Ensure that your thermostat is set higher than the temperature in your home.
Is the furnace s blower constantly running.
Your thermostat s fan setting.
Turn off your furnace turn your thermostat from heat to off.
A furnace blowing cold air could be due to your thermostat.