it may blow cold air due to the fact that the heat anticipator on your thermostat may be set to long. you can change useing your owners manual for your thermostat but you should have a service tech do it
What type of furnace do you have?electric
What type of furnace do you have?electric
Because you set it that way
because you got to light it....commen mistake
If the furnace only blows cold air the pilot light may be out. It may also be a fuse that has blown. However, you may need to contact a licensed electrician to find the problem.
Not knowing what kind of furnace you have makes answering this difficult. What type of furnace do you have (gas,electric, oil) and how old is it?
Perhaps the pilot light is out and the gas has been turned off at the valve.
Either the fan is set at too high a speed or the burner did not light.
It means that you constantly are changing your mood.
There is a delay on the fan to allow the furnace to get hot so as not to blow cold air into the home at start up. There is also an `OFF` delay, where the fan runs for a minute or so after the flame shuts off. This is to cool down the furnace.
What type of system do you have? Heat pump? With or without supplemental electric strip heat? Warm air furnace? Need to know in order to help.
A heat pump will do this, a furnace should not. Are you sure you have a furnace?