Johnson Controls T-4002-301 Conversion Kit 30067439-890 the Watts 0358550 (Series 374A)

the Watts 0358550 (Series 374A) is the industry standard for reliable overpressure protection

How do I know if the S1-024-34685-000 is failing

Technicians should check for continuity across the switch during blower operation and verify that the internal diaphragm responds to the pressure drop across the air cleaner cabinet

it is the standard OEM replacement kit for that specific series

while the durable contact construction maintains circuit integrity over frequent cycles

Johnson Controls T-4002-301 Conversion Kit 30067439-890 the Watts 0358550 (Series 374A)The Johnson Controls T 4002 301 Conversion Kit is a professional grade solution designed for upgrading or replacing legacy pneumatic thermostats in commercial HVAC systems. This direct acting kit features a 55 85F dial range, providing precise setpoint control for single temperature applications. Engineered for seamless integration into existing pneumatic control loops, the assembly simplifies the transition from older dual tube or single tube