Trane CNT5272 Ignitor Control 320720 756 Integrated Gasket Seal: Includes a Integrated Gasket Seal: Includes a factory installed gasket that provides a precise seal against the heat exchanger Integrating this 150 degree high limit control into your service routine ensures systems maintain UL compliance and intended combustion safety parameters Enhanced Safety Lockout: Features a dedicated ignition lockout mechanism that shuts down the system during failed starts to protect the heater and facility The integrated lockout function provides an essential safety layer by terminating the gas valve signal if the pilot fails to light after consecutive attempts