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