backdrafting
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Incomplete brning of the gas, resulting in carbon monoxide being produced.
no heat would flow
With central air the furnace fan must be running to provide the air to the living space. If the furnace fan is not running then you get no air out of the ducts and the A-coil (the part of the ac system that is in your furnace duct) will freeze and shut down the compressor (the part that is outside).
If your referring to the cooling portion of your central air conditioning the answer is no.
Because you set it that way
The purpose of secondary air in a furnace is to enhance combustion efficiency by providing additional oxygen to the combustion process. This secondary air helps to ensure more complete burning of the fuel, which reduces emissions of unburned hydrocarbons and carbon monoxide. Additionally, it can improve heat distribution and overall furnace performance by promoting a more stable and hotter flame.
Replacing the furnace filter can improve air flow in your furnace by allowing air to pass through more easily. This helps the furnace operate more efficiently and can improve air quality in your home.
A "gas furnace" is called a furnace, an "electric furnace" is called an Air Handler
Is there a flame in the furnace. Precisely where is this air coming from and how strong is it?
Insufficient air flow means not enough air is moving for the task at hand. For example, a clogged filter will not let enough air through, creating insufficient air flow.
Banging noises in furnace air return pipes can be caused by rapid temperature changes, loose ductwork, or insufficient support brackets. When warm or cool air flows through the ducts, they expand or contract, causing the metal to make noise. Adding insulation, tightening connections, or securing brackets can help reduce the banging sound.
the arrow points in the direction of air flow.
What type of furnace do you have?electric
it's the same as the furnace filter. the air conditioner runs through the furnace to push he cold air. change your furnace filter and you are changing the air filter on the air conditioner
The furnace air filter is typically located near the air intake of the furnace, which is usually found in the return air duct or near the blower motor. It is important to regularly check and replace the filter to ensure proper functioning of the furnace.
Air flows in a furnace from the return ducts into the furnace, where it is heated and then pushed out through the supply ducts to heat the home.
Regularly replacing the air filter in a furnace helps improve air quality, increase energy efficiency, and extend the lifespan of the furnace.
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.