Pilot safety shutoff valves are essential safety devices for gas furnaces. They work to prevent the furnace from operating if the pilot light goes out. This is important because a furnace that operates without a pilot light can produce dangerous levels of carbon monoxide. Carbon monoxide is an odorless, colorless, and poisonous gas that can cause headaches, nausea, dizziness, and even death.
Why are pilot safety shutoff valves necessary?
Pilot lights can go out for a variety of reasons, including drafts, power outages, and mechanical failures. If a pilot light goes out and the furnace continues to operate, the burner will not receive any fuel and will not produce heat. However, the fan will continue to run and circulate the air, which can carry carbon monoxide throughout the home.
How do pilot safety shutoff valves work?
Pilot safety shutoff valves are typically located near the pilot light. They work by using a thermocouple, a device that generates a small electrical current when heated. When the pilot light is on, the thermocouple will generate a current that flows through a solenoid, a magnetic valve. The solenoid uses this current to keep the gas valve open.
If the pilot light goes out, the thermocouple will no longer generate a current and the solenoid will lose power. This will cause the gas valve to close, cutting off the flow of gas to the burner.
Are pilot safety shutoff valves required?
Pilot safety shutoff valves are required by law in most states and municipalities. They are considered a basic safety feature that can help prevent carbon monoxide poisoning and other accidents.
How can you tell if the pilot safety shutoff valve is working?
You can test the pilot safety shutoff valve by turning off the furnace and then turning it back on. If the pilot light does not light, the valve is working properly. You should also test the valve annually by following the instructions in your furnace's owner's manual.
