Johnson Controls T-4002-9008 Pneumatic Thermostat Els PW 17895 ensure the tube openings face

ensure the tube openings face upward and the gas orifices are centered to maintain the correct air-to-fuel ratio across the burner tube

this auto reset thermal switch prevents heat exchanger damage and ensures consistent blower cycling

leaving the valve body and liquid circuit intact

Complete Field Kit: Includes the 9/64" hex wrench and matching screws to eliminate tool-sourcing delays during service calls

Johnson Controls T-4002-9008 Pneumatic Thermostat Els PW 17895 ensure the tube openings faceThe Johnson Controls T 4002 9008 is a professional grade direct acting pneumatic thermostat engineered for precise proportional control in commercial HVACR systems. Designed for horizontal mounting, this single temperature controller manages heating and cooling applications by providing a proportional output air signal that modulates terminal equipment in response to localized load changes. Operating within a set point range of 12 to 30 degrees