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.
Thermostat and Gas Valve
If your gas valve is working fine, but the furnace isn't turning on, check to make sure your pilot light is on. For instructions on relighting the pilot light, refer to your manufacturer instructions or contact a professional.
Welcome to Furnace 101, where we teach you the basics of your furnace and how it works to provide heating to your home.
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