McDonnell & Miller 310462 Switch Assembly R-410A the start relay is the

the start relay is the primary suspect

maintaining the integrity of the gas regulator valve assembly is essential for preventing creep and ensuring precise downstream pressure control in systems flowing natural gas

allowing it to be used in various high-voltage motor and heating element circuits

consider adding an external 3-amp inline fuse on the secondary side

it utilizes a non-stick PTFE (Teflon) disc-to-metal seat

McDonnell & Miller 310462 Switch Assembly R-410A the start relay is theThe McDonnell & Miller 310462 (Model SWA 150S) is a heavy duty snap action switch assembly designed for precise low water cut off and pump controller transitions. This automatic reset assembly is a critical replacement component for Series 150S and Series 157S mechanical boiler controls. Built to manage steam boiler water levels up to a maximum operating pressure of 150 psi, the SWA150S provides reliable SPDT switching to prevent dry fire conditions