McDonnell & Miller 354001

McDonnell & Miller 354001 is a 24V, dual SPST (two independent switches) manual reset switch designed for McDonnell & Miller boiler controls, including models 64 and 67. This durable device provides a reliable safety interlock and serves as a convenient replacement part for HVAC and boiler control panels.

Engineered for steady performance in safety-critical circuits, the 354001 offers a simple installation path and dependable operation across cycling events. Its compact form fits standard control enclosures and supports straightforward maintenance of legacy systems.

• 24V electrical rating ensures compatibility with common boiler control circuitry.
• Dual SPST contacts provide two independent switching paths in one compact unit.
• Manual reset feature enables intentional restart after a fault.
• Designed for McDonnell & Miller 64 & 67 controls compatibility with legacy systems.
• Easy installation as a direct replacement part in compatible panels.

Whether you are replacing a failed switch or stocking trusted parts for ongoing maintenance, the McDonnell & Miller 354001 delivers reliability, safety, and peace of mind for essential boiler and HVAC control applications.