This controller is a direct drop-in for electronic temperature control upgrades where reliable switching and clear setpoint visibility are non-negotiable for system uptime

A 3-flash sequence typically indicates an ignition lockout

For non-conductive fluids

Designed as a direct OEM replacement start capacitor

McDonnell & Miller 311200 Float and Gasket Refrigerant This controller is a directThe McDonnell & Miller 311200 Float and Gasket is a critical OEM replacement kit for Series 21 (Model 21 30) mechanical water feeders. As a veteran grade boiler replacement part, this assembly is engineered to maintain precise fluid level control in condensate receiver tanks and industrial boiler systems. The 4 3 4 copper float and high grade replacement gasket ensure a professional grade seal and reliable proportional feed action. Supporting a