This high-limit thermistor sensor is a safety device designed to communicate with the system to shut down the heater if the water temperature exiting your heater exceeds 118 degrees F It simply screws into the No-Fault Heater Housing (hand tight only) and ...read more

OBSOLETE This is the replacement thermistor for all 1994 Hot Spring spa models and 1995-1998 Hot Spot RE, RLX, SE & SLX spa models This Control Thermostat Thermistor communicates the actual water temperature to the controller to shut off the heater ...read more

OBSOLETE-Use 39205 This control thermostat thermistor sensor detects the spa water's temperature and relays that information back to the system It simply screws into the No-Fault Heater Housing (hand tight only) and then plugs directly onto the ...read more

Obsolete: Factory replacement suggestion item #39204 The high-limit thermistor sensor is a safety device designed to communicate with the system to shut down the heater if the water temperature exiting your heater exceeds 118 degrees F It simply screws ...read more