For technicians conducting leak verification

This HVAC safety switch is the industry standard for maintaining UL compliance and system reliability in residential forced-air applications

45" length and 3/4" diameter ensure a perfect fit with standard Trane fan wheel hubs and motor pulleys

The bulb features a #19 style head with universal grooves for secure installation using retaining C-rings

Heil Quaker ICP 1173408 Monitor Board 30067439-890 For technicians conducting leak verificationThe Heil Quaker ICP 1173408 Monitor Board is a critical OEM replacement part designed for high stakes 3 phase HVACR equipment protection. This Relay Phase Monitor Board tracks incoming line voltage and sequence in real time, providing an essential secondary safety layer for scroll compressors and three phase motors. By monitoring for phase loss, reversal, and voltage unbalance, this board prevents the mechanical destruction that occurs when a