Johnson Controls T-4756-1738 Plastic Cover

The Johnson Controls T-4756-1738 is a durable beige plastic thermostat cover and faceplate designed specifically for the T-4000 series pneumatic room thermostats. This field-replacement component is engineered for horizontal mounting configurations where dual-setpoint visibility is required. It features two clear setpoint windows to accommodate high/low or heating/cooling adjustments without removing the enclosure. The integrated bimetal thermometer provides accurate ambient temperature readings, utilizing a high-contrast dual-scale dial that displays both Fahrenheit and Celsius. Construction consists of impact-resistant ABS plastic, ensuring protection for sensitive internal pneumatic components in commercial and industrial environments. This cover fits securely over the T-4000 chassis, maintaining the original calibration and setpoint accessibility essential for HVAC pneumatic control systems and zone temperature management.

• Universal Dial Scales: Includes both metric and imperial measurements for streamlined site inspections.
• Dual Setpoint Visibility: Two dedicated windows allow for dual-temperature monitoring without housing removal.
• Direct OEM Replacement: Ensures a precise fit for existing Johnson Controls T-4000 series pneumatic controllers.
• Easy Installation: Horizontal orientation aligns with standard pneumatic wall plates for fast field service.

Common Technical Questions

Is this cover compatible with vertical T-4000 models?
No, the T-4756-1738 is specifically designed for horizontal mounting to ensure the thermometer dial is oriented correctly for the user.

Does this include the adjustment knobs?
This part number typically refers to the plastic cover and faceplate assembly; internal adjustment knobs are separate components of the thermostat subbase.

Can this be used for both single and dual temperature thermostats?
Yes, while it features two windows for dual-setpoint models, it provides a clean professional look for single-setpoint applications needing a visual thermometer.

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.