How Does My Furnace's Gas Valve Work? The gas valve on your furnace is one of the most important parts! Without it, your house would be quite cold! The gas valve on your furnace is one of the most important parts. It is ultimately responsible for delivering an adjusting the flow of gas pressure to your furnace to keep it lit when running. A gas valve replacement is a common furnace repair in older furnaces. Let's take a look at the different kinds and how they work to keep your home warm in the winter! Types of Gas Valves Combination gas valve: This type of gas valve was introduced around the 1960s. A combination gas valve contains a handle, a thermocouple, a regulator, and a solenoid valve. In essence, it contains everything needed for the operation of a gas fired furnace. Gas chain: These types of gas valves are quite common and require the operator to manually turn a valve to open or close the flow of gas to the furnace. Once opened by the user, the solenoid valve will only open to allow gas to flow when the furnace actually calls for heat. Otherwise, you'd have a non-stop flow of gas into your home! A safety switch will only remain open if the thermocouple is heated to a minimum temperature, verifying the furnace is actually in heating mode. How The Gas Valve Works The furnace's gas valve is operated by electromagnets. There are two different valve's that work in...Read More
HVAC Tips from Sears Heating and Cooling
We’ve been in the HVAC business since 1950, and with that experience comes a lot of knowledge. Read our professional tips here.