Johnson Controls T-4000-2138 Plastic Cover Common Questions How do I

Common Questions How do I know if my furnace door switch is faulty

maintaining system integrity behind the primary safety loop

Is the S1-024-35596-000 an auto-reset or manual-reset switch

Tetraseal o-rings are specialized for these conditions

Designed for a 1/8" compression by 1/4" MNPT connection

Johnson Controls T-4000-2138 Plastic Cover Common Questions How do IThe 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