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Thermistor, Control Thermostat, Hot Spring '94 & Hot Spot '95-'98

Item #: 38564

Thermistor, Control Thermostat, Hot Spring '94 & Hot Spot '95-'98


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 when the spa reaches target temperature. It is used on all 2006-current Hot Spot Mallorca, Sorrento, Trinidad & Tobago spa models. It is also used on all 2006-current Solana RX, SX & TX spa models.

Test Procedure

1. Set the meter to 20K on the OHM scale.
2. Record the temperature of the spa water.
3. Unplug the thermistor from the control box.
4. Meter across the two Thermistor leads.
5. Refer to the Temperature versus Resistance chart below to find the correct resistance value for the temperature measured. If the temperature and resistance does not match that of the chart, this test has failed and the thermistor must be replaced. Remember if the spa has been inactive, the spa water temperature may be different
than the water temperature in the heater housing.

This chart shows the OHM range of the thermistor
Click to enlarge
Printable PDF

Check Serial Number Compatibility