McDonnell & Miller 6667 Low Water Cut-Off Head MechanismMcDonnell & Miller 6667 Low Water Cut Off Head Mechanism is a reliable replacement part that helps protect your boiler by accurately detecting low water conditions. This head mechanism is designed for the 67 67 LQHU series float type LWCO, ensuring a seamless fit and proven performance in your heating system. Engineered for consistent signaling and long term reliability in demanding boiler conditions. Includes gasket and bolt for a complete

The Lochinvar PLT3023 Heating Boiler Flame Sensor is a critical safety and ignition component designed for dependable boiler operation

the Goodman BT1420029 is engineered for straightforward retrofit with standard hand tools

the MEP562 combines rugged electronics with intuitive diagnostics and dependable performance

this pan integrates with common drain lines and drip fittings

adjustable differential pressure control designed for reliable condenser fan cycling and low-pressure applications

programmable fan timing for steady airflow and energy efficiency

Powered by 120 V AC at 50/60 Hz and drawing 0

Battery power or 24V hardwire power options

The unit mounts on the primary side with a 3-wire setup and uses thumb screw terminations for quick connections

It integrates with standard valve trims and 3/8-seat configurations

Mounting: Primary with 3-wire

and circulator relays