because you got to light it....commen mistake
Because you set it that way
Perhaps the pilot light is out and the gas has been turned off at the valve.
# Why doe the gas furnace blow black smoke?
Do you have a heat pump or Gas Furnace? With my car, it was Heater matrix clogged with radiator sealant. The workshop cleaned it and it's start working fine!
Your gas furnace may be blowing 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 a faulty heating element. It is recommended to have a professional HVAC technician inspect and repair the furnace to resolve the issue.
gas leak or wrong wiring
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?
Gas furnace are more energy efficient in my opinion. Electric furnaces use forced air and when you blow air over an electric element, it takes more energy to keep it hot.
A "gas furnace" is called a furnace, an "electric furnace" is called an Air Handler
Primary air is the air that mixes with the gas before the gas is burned.
i have a 20 year old rheem gas furnace with an electric ignition. when i turn up the thermostate, the pilot starts up but that's it. it doesn't do anything else. What could be the reason for this?
A gas burner in a gas-fired furnace mixes air and gas to create a combustible mixture. The burner nozzle releases gas, which mixes with air that is drawn in from the surrounding environment. This mixture is then ignited to produce heat for the furnace.