Johnson Controls T-4100-2 Thermostat 30067439-890 the part should be replaced

the part should be replaced to prevent motor overheating

Achieving higher protection ratings like IP65 requires the addition of a compatible DIN cable plug

allowing for manual system testing and troubleshooting without specialized tools

and surface measurements

Johnson Controls T-4100-2 Thermostat 30067439-890 the part should be replacedThe Johnson Controls T 4100 2 is a professional grade pneumatic thermostat designed for precision control in low volume output applications. This reverse acting pneumatic controller utilizes a force balance mechanism to modulate branch pressure in response to temperature fluctuations, ensuring stable HVAC performance. Engineered for vertical mount installations, the T 4100 2 features a 55 to 85 degree Fahrenheit dial range and is optimized for systems