Carrier 331831-701 Adapter Assembly 320788-702 This hot surface ignitor serves

This hot surface ignitor serves as the updated factory-authorized version for the legacy part number 9004519205

Life safety systems require UL555S rated actuators specifically designed for high-temperature cycles

Common Questions How do I set the fan cut-in and cut-out temperatures

Is the bulb position sensitive

there is no functional difference

Carrier 331831-701 Adapter Assembly 320788-702 This hot surface ignitor servesThe Carrier 331831 701 Adapter Assembly is a critical OEM replacement part designed for high performance integration within Carrier, Bryant, and Payne heat pump and air handler systems. Engineering this assembly as a Factory Authorized Part ensures that it meets exact manufacturer tolerances, maintaining the structural integrity and operational efficiency of the refrigeration or ventilation circuit. For technicians, this part is essential when