Johnson Controls T-4002-3004 Guard Els PW 17895 WC ratings ensure the switch

WC ratings ensure the switch closes and remains closed only when proper negative pressure is established

including 2 HP motors and large resistive heating elements

and Tempstar furnace models

High-Flow Pilot Design: Provides consistent opening and closing cycles under varying pressure drops across the valve

Johnson Controls T-4002-3004 Guard Els PW 17895 WC ratings ensure the switchThe Johnson Controls T 4002 3004 Guard is a professional grade, heavy duty solution designed to provide superior surface mounted thermostat protection for the T 4000 Series equipment. Engineered specifically for pneumatic thermostat systems, this assembly features a rugged cast aluminum thermostat guard that prevents tampering and mechanical damage in high traffic commercial or industrial environments. The unit includes a dedicated mounting bracket,