Johnson Controls T-4000-2145 Plastic Cover This SPST normally closed switch

This SPST normally closed switch is engineered to break the electrical circuit when the plenum temperature reaches the 200°F fixed open temperature

and 8201-050BX

This assembly is optimized for Building Automation Systems (BAS) and commercial HVACR environments where HVAC valve control must remain consistent under high static pressures

protecting the motor windings from premature failure due to voltage instability

Common Installation Questions How do you limit a Danfoss radiator valve temperature range using these pins

Johnson Controls T-4000-2145 Plastic Cover This SPST normally closed switchThe Johnson Controls T 4000 2145 Plastic Cover is a professional grade replacement engineered specifically for T 4000 series pneumatic thermostats. This beige thermostat cover is designed for vertical mounting applications and provides a clean, secure finish for your field installations. Featuring a single set point window, it allows for immediate visual verification of thermostat settings without the need to remove the housing, streamlining routine