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Ships within 48 hours · Estimated delivery Sep 14 - Sep 19
This OEM replacement actuator is designed for a seamless drop-in fit
always verify the boiler parts list for the specific series you are servicing
ensuring long-term reliability in critical HVAC applications
As a 24V redundant gas valve
Johnson Controls T-4003-203 Thermostat Refrigerant This OEM replacement actuator isThe Johnson Controls T 4003 203 is a high volume output submaster pneumatic thermostat engineered for precise proportional control in complex HVAC systems. Designed for reverse acting operation, this unit utilizes horizontal mounting and is specifically calibrated for applications where a remote master controller resets the setpoint based on external variables like outdoor air temperature. With a massive 400 SCIM flow capacity and a low 20 SCIM air
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