For steam-specific relief

When installing this HVAC furnace ignitor

Key Benefits Complete Manifold Assembly: Includes the 327972-765 gas valve

Is the 203541 interchangeable with the 203541/U

eliminating the need for manual intervention during standard cycling

United Electric B54-103 Temp Switch 320074-702 For steam-specific reliefThe United Electric B54 103, also identified as the B54 103 9040, is a professional grade immersion temperature switch engineered for reliable set point control in boilers, heat exchangers, and industrial process tanks. This SPDT immersion switch features an adjustable temperature range of 0 to 225F, allowing technicians to fine tune thermal limits using the internal reference dial. Built with a brass immersion stem and a rugged NEMA 1 Lexan