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Why does my pilot light keep burning out?

Why does my pilot light keep burning out?

If your furnace pilot light keeps going out, it’s likely you have a broken thermocouple in your gas furnace. The thermocouple is a rod that comes into physical contact with the flame in your system. When this component is not able to detect the flame, it will close the gas valve to prevent a gas leak in your home.

Why does my thermocouple keeps burning out?

It’s Dirty. Soot buildup on the thermocouple may block the flame. Under constant exposure to a hot flame, a thermocouple wears down over time. Even a slight residue can make the thermocouple malfunction.

How does a standing pilot work on a gas burner?

On a standing pilot model we still use a thermocouple, but in a different way. The pilot valve is also built into the combination gas valve, so there’s no more “B” cock. To light the pilot, you hold down the button on the gas valve to start the flow of gas to the pilot burner.

How does the gas in a pilot light work?

To solve this problem, the pilot light tube has a valve that cuts the gas to the pilot light in the event that it ever blows out. This valve is actually a fascinating little piece of equipment.

Why does my furnace pilot light keep burning?

One of the reasons why a pilot light can start to burn inefficiently is that dirt can build up on its gas intake valve. When this happens, the flame’s oxygen supply will be restricted. You can avoid this problem by getting a furnace tune-up every year, when we’ll clean the intake valve, and also by changing your air filter every month.

What happens to the gas when the pilot goes out?

If the pilot goes out, no gas will flow into the valve. The only difference between the pilot safety switch and the combination gas valve is that the pilot safety switch is shutting the gas off electrically, and the thermocouple in the gas valve is shutting the gas off mechanically.

How does the gas valve on a pilot light work?

In most appliances, a clip holds it about an inch from the pilot aperture. When you light the pilot and the flame heats the thermocouple probe to its critical temperature, a small electric current signals the gas valve to stay open.

How does a pilot light work on a water heater?

When you need hot water, the gas valve will open up and the pilot light will ignite the fuel. In a tank-type water heater, the burning gas heats up the water inside the tank. In a tankless water heater, the burner heats up water as it passes through a coil.

Why does the pilot light on my furnace keep going out?

The thermocouple is the copper rod the pilot flame directly hits. Sometimes it’s referred to as the “flame sensor.” It’s a safety mechanism that shuts the gas off should the pilot go out. If the thermocouple fails to shut off the gas, all the gas flowing through the furnace could get into your home.

What kind of gas does a pilot light use?

A pilot lightis a small gasflame, usually natural gasor liquefied petroleum gas, which serves as an ignition source for a more powerful gas burner. Originally a pilot light was kept permanently alight, but this wastes gas.