Because you set it that way
Either the fan is set at too high a speed or the burner did not light.
Perhaps the pilot light is out and the gas has been turned off at the valve.
An air conditioner blows out heat
If it's blowing intake-temperature air, either you've got the fan alone switched on or the heating part isn't working for some reason. If it's a gas furnace, the pilot light may have gone out, or the gas may be shut off somewhere (at the furnace itself, at the emergency shutoff for the house, or possibly at the main inlet). If it's blowing actually COLD air (colder than intake), then you've probably got central air and you've somehow managed to turn on the air conditioner.
no heat would flow
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.
ruud furnace only blows cold air, no heat
because you got to light it....commen mistake
Your furnace may be blowing cold air and then hot air intermittently due to a malfunctioning thermostat, a clogged air filter, or issues with the furnace's ignition system. It is recommended to have a professional HVAC technician inspect and repair the furnace to resolve the issue.
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
A furnace may blow cold air instead of warm air due to issues such as a malfunctioning thermostat, a clogged air filter, a problem with the pilot light or ignition system, or low fuel supply. It is important to troubleshoot and address these issues promptly to restore the furnace's proper functioning.
The furnace may blow cold air instead of warm air due to issues such as a malfunctioning thermostat, a clogged air filter, a problem with the pilot light or ignition system, or low fuel supply. It is important to troubleshoot and address these issues promptly to restore the proper functioning of the furnace and ensure it blows warm air.
Either the fan is set at too high a speed or the burner did not light.
Perhaps the pilot light is out and the gas has been turned off at the valve.
why does ac blow warm air? why does ac blow warm air?
What type of furnace do you have?electric
Your furnace may be blowing cold air instead of warm air due to issues such as a malfunctioning thermostat, a clogged air filter, a faulty pilot light, or a problem with the heating element. It is recommended to check these components and consult a professional if needed to diagnose and fix the problem.