Johnson Controls T-4000-2138 Plastic Cover Direct Cross-Reference: Fully interchangeable with

Direct Cross-Reference: Fully interchangeable with ARM1010 and obsolete part number 100133544 for seamless inventory management

including the FG6RA series

ensuring durability in demanding mechanical rooms

"drop-in" installation without the need for field modifications

Johnson Controls T-4000-2138 Plastic Cover Direct Cross-Reference: Fully interchangeable withThe Johnson Controls T 4000 2138 is a professional grade beige plastic thermostat cover designed specifically for T 4000 series pneumatic room thermostats. This field standard component provides a clean, streamlined aesthetic for commercial HVAC systems where tamper resistance and a minimalist profile are required. Engineered for versatility, the T 4000 2138 supports both horizontal and vertical mounting configurations, accommodating various pneumatic