Bosch 8737716136 Control Unit HT3 GZT5-II

- Manages heating and hydraulic operation of the appliance.

- Includes a service mode for draining and servicing hydraulic components.

- Fully enclosed white plastic module.

- Mounts directly onto the appliance's hydraulic assembly.

- Row of sealed rubber grommet ports across the rear panel.

- Grommet ports protect internal electronics from moisture.

- Two gray rotary control dials on the front.

- Connector port at the base for system wiring.-

- Comes with mounting clip and metal bracket for installation.

- Alternate part number 8-737-716-136.

The Bosch 8737716136 is an HT3 GZT5-II control unit that acts as the main electronic controller for compatible HVAC systems, managing the heating and hydraulic operation of the appliance it is installed in and giving technicians direct access to system settings, including a service mode used when the hydraulic components need to be drained or serviced. It is built as a fully enclosed white plastic module designed to mount directly onto the appliance's hydraulic assembly, with a row of sealed rubber grommet ports across the rear panel that let the pipe and cable connections pass through while keeping the internal electronics protected from moisture. Two gray rotary control dials sit on the front alongside the protected control interface, and a connector port at the base ties the module into the system wiring for straightforward setup. The unit comes with the mounting clip and metal bracket needed for installation.