Description
The Johnson Controls T-4000-615 Test Port Fitting Plug-In is a small component typically replaceable and is used for the servicing of pneumatic thermostats in the T-4000 series of Johnson Controls. It plays the role of a seal when the vehicle is operational and reduces air leaks in the system. However, the unique selling point of this plug-in is that it is easily detachable to make a test port. This test port enables a technician to connect pressure gauges and other diagnostic instruments directly to the thermostat, for testing and other tasks. By disconnecting a certain part of the pneumatic system, the technicians can identify problems and guarantee that the thermostat operates at the right parameters.
