Johnson Controls T-4000-3144 Plastic Cover

Maintain the integrity and professional finish of your pneumatic control systems with the Johnson Controls T-4000-3144. This high-density white plastic thermostat cover is specifically engineered for vertical mounted thermostats, providing a streamlined, tamper-resistant solution for commercial HVAC environments. Designed as a direct replacement for the T-4000 series, this model features a concealed design with no thermometer window and no setpoint adjustment window, effectively preventing unauthorized setpoint drifting and protecting sensitive bimetal sensing elements from dust and debris.

For veteran technicians, the T-4000-3144 offers a precise fit over standard Johnson Controls pneumatic thermostats and H-4100/H-5100 series humidity instruments. The impact-resistant construction ensures durability in high-traffic mechanical areas, while the molded Johnson Controls logo maintains the OEM aesthetic. This pneumatic control accessory is essential for clean-room or secure-facility applications where a "blind" cover is required to ensure consistent system calibration and energy efficiency. Installation is straightforward on existing vertical mounting brackets, securing the internal components without interfering with 5/32" O.D. polytubing connections.

Key Benefits

• Tamper-Resistant Design: The solid face without windows prevents unauthorized adjustments to pneumatic thermostat setpoints.
• OEM Compatibility: Specifically designed for Johnson Controls T-4000 series vertical instruments and humidity controllers.
• Durable Protection: High-quality white plastic housing shields internal bimetal elements from mechanical damage and contaminants.
• Professional Aesthetic: Features the official logo for a clean, uniform look in any commercial or industrial facility.
• Optimized for Vertical Mounting: Perfectly aligned for standard vertical wallbox or surface-mount configurations.

Common Questions

• Will this cover fit horizontal T-4000 models? No, the T-4000-3144 is strictly for vertical mounted thermostats. Horizontal units require a different part number to align with the internal subplate.
• Does this cover include a built-in thermometer? This specific model is a "blind" cover, meaning it has no thermometer and no setpoint windows to maximize security.
• Is this compatible with other brands? While designed for Johnson Controls, it is primarily intended for use with their proprietary T-4000 series pneumatic hardware.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.