9008172005 Remote Temperature Controller
The 9008172005 Temperature Remote Controller (TM-RE40) has two functions. It allows the output temperature from the water heater to be adjusted within the range of 100 °F to 185 °F, and it also works as a diagnostic tool that will give a concise error code whenever there is a problem with the unit.
For Use with the following models:
T-KJr2U-IN, T-KJr2U-OS, T-K4U-IN, T-K4U-OS, T-D2U-IN, T-D2U-OS, T-H3M-IN, T-H3M-OS, T-H3J-IN, T-H3J-OS, T-H3S-IN, T-H3S-OS, T-H3-IN, T-H3-OS