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

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

protecting the motor windings from premature failure due to voltage instability

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