Technicians should measure the DC microamp signal in series with the flame sensor

the MARS 11953 is the likely solution

This switch is vital for technicians performing scheduled maintenance or emergency repairs on high-pressure 410A systems

What causes these switches to fail

Direct OEM Replacement: Seamlessly replaces Rheem Protech 62-22578-01 units without requiring wiring harness modifications

White-Rodgers 36C53-418 Gas Valve R-410A Technicians should measure the DCThe White Rodgers 36C53 418 is a professional grade, 24V standing pilot gas valve designed for versatility in residential and light commercial heating applications. This slow open gas valve provides a 3 4" x 3 4" NPT connection and a robust capacity of 335,000 BTU hr (Natural Gas at 1" PD), making it an ideal choice for high demand furnaces and boilers. The slow opening feature ensures a controlled ignition sequence, reducing burner noise and