Johnson Controls T-4000-3140 Plastic Cover

Professional-grade Johnson Controls T-4000-3140 plastic covers are engineered for high-performance pneumatic room thermostat applications. This horizontal-mount faceplate is compatible with nearly all T-4000 series instruments, excluding the T-4100 and T-4600 models. Constructed from durable, white thermoplastic, the T-4000-3140 features a built-in Fahrenheit/Celsius thermometer to provide clear ambient temperature feedback for facility maintenance and field calibration. The design intentionally lacks setpoint windows, ensuring a tamper-resistant interface that prevents unauthorized manual adjustments in commercial or industrial environments. Mounting is seamless via standard #4-40 hex screws, making it a direct replacement for worn or damaged covers on single temperature or dual dial units. Whether you are performing a routine inspection or a complete system overhaul, this genuine HVAC replacement part ensures the protection of sensitive internal bimetal sensing elements while maintaining a clean, professional aesthetic for building automation systems.

• Enhanced Durability: Rugged white plastic construction protects internal pneumatic components from dust and impact.
• Tamper Prevention: No setpoint windows restrict access to calibration dials, maintaining system balance.
• Universal HVAC Compatibility: Fits the majority of Johnson Controls pneumatic thermostats in horizontal configurations.
• Integrated Monitoring: Factory-installed thermometer allows for quick verification of space conditions without specialized tools.

Which thermostat models is this cover compatible with?
The T-4000-3140 is designed for the T-4000 series. It fits all standard horizontal instruments but is not compatible with the T-4100 or T-4600 series.

Does this cover allow for manual setpoint adjustment?
No, this specific model features a solid faceplate with no setpoint windows to prevent end-user interference with the thermostat settings.

What mounting hardware is required?
This cover typically utilizes standard #4-40 x 1/4 inch hex head or Torx tamper-proof screws (sold separately) for secure attachment to the mounting bracket.

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.