The Whirlpool WP338906 is a flame sensor designed exclusively for gas dryers. It serves as a safety switch by detecting heat from the igniter. Once the igniter has reached a safe temperature, the sensor opens the gas valve, allowing the burner to ignite and heat the dryer. A defective sensor can prevent the dryer from heating properly and result in gas leaks. The WP338906 is required ... https://www.hnkparts.com/wp338906-whirlpool-sensor-dryer-gas