Float Switch KitItem Number TTCF-FLS
The low fluid level float switch turns off the power to the heater when the fluid in the tank drops below an acceptable level. When this happens the red indicator light on the electrical box illuminates.
If the fluid in the tank ever overheats, the "float" on the end of the switch is designed to melt to protect the heater. If this happens you will need to replace the switch in order to restore heat to your tank.