What does a gas furnace's ignition control module monitor?

The ignition control module in a gas furnace is essential for safe and efficient operation. Its primary function is to monitor electric interlocks, which ensure that the furnace operates only when it is safe to do so. These interlocks are safety devices that verify the correct sequence of operations. For instance, the ignition control module confirms that the gas valve is closed when the ignition system is not activated and that the blower motor is functioning properly before allowing the ignition process to begin.

By effectively managing these interlocks, the ignition control module helps prevent hazardous situations, such as gas leaks or unlit burners, which could lead to dangerous conditions or inefficiencies in heating. Proper monitoring contributes significantly to the overall safety and performance of the furnace, guaranteeing that it ignites and operates correctly each time it is called upon to heat a space.