Johnson Controls T-4000-2140 Plastic Cover

The Johnson Controls T-4000-2140 is a high-durability beige plastic cover engineered specifically for horizontal mounted thermostats within the T-4000 series pneumatic control family. This rugged thermostat cover provides essential protection for bimetal sensing elements while maintaining a professional aesthetic with the integrated Johnson Controls logo. Designed for utility and precision, the faceplate features a high-visibility F/C thermometer for at-a-glance temperature verification, though it purposefully excludes set point windows to prevent unauthorized adjustments and maintain system calibration integrity in high-traffic commercial or industrial environments.

When performing field maintenance or retrofitting existing pneumatic control accessories, this horizontal thermostat cover ensures a seamless fit on T-4002, T-4003, and T-4100 models. The ABS plastic construction offers excellent resistance to vibration and mechanical shock, critical for maintaining proportional output signals in robust HVACR systems. Accurate pneumatic thermostat operation depends on unobstructed airflow; this cover?s vented design allows for precise room air sampling without exposing sensitive internal components. For contractors looking to standardize their building?s appearance while securing temperature set points, the T-4000-2140 is the standard professional choice for reliable HVAC temperature control protection.

• Tamper-Resistant Design: The absence of set point windows restricts unauthorized access to the internal thermostat dials, ensuring the system remains at the engineered specifications.
• Integrated Monitoring: A dual-scale Fahrenheit and Celsius thermometer allows for quick diagnostic checks without requiring a separate hand-held probe.
• Durable Material: Constructed from impact-resistant ABS plastic, providing a long service life in harsh mechanical environments.
• Direct OEM Compatibility: Engineered specifically for the T-4000 series, ensuring proper alignment with the mounting base and internal bimetal elements.

• Does this cover work with vertical-mounted thermostats? No, this specific model is designed for horizontal orientation. For vertical applications, a vertical-specific T-4000 series cover is required to ensure the thermometer remains legible and the vents function correctly.
• Can I adjust the temperature with this cover on? This cover is intended for "blind" operation; because it lacks set point windows, the cover must be removed to adjust the internal set point dials.
• Is the mounting hardware included? Typically, these covers snap onto the existing thermostat base plate, though it is always recommended to verify the condition of your subplate before installation.

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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.