When the thermostat sends its signal to the furnace, the furnace gas valve opens and ignites the burner component beneath the combustion chamber. The gas valve works with the thermostat to regulate the amount of gas that flows into your furnace.
What Is a Furnace?
As the heat circulates through the heat exchanger, the blower motor and fan moves the heat through plenum, and from there through the rest of the ductwork in your home. The heat flows through the various vents in your home to provide you with heat. Once enough heat is generated, the thermostat will shut off the heater.
Understanding how your furnace works will help you troubleshoot your furnace and potentially avoid an expensive HVAC service call. Sometimes, you can quickly solve the problem yourself. Other times, you can easily show the problem to your HVAC technician, saving time and frustration. You'll also impress the technician.
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