Discontinued
Each spa is equipped with a control thermistor that is used as temperature sensor. The thermistor is a semiconductor that changes resistance with temperature changes (as the temperature goes up, the resistance goes down). The control thermistor is used to regulate the spa water temperature.
38564 C Thermistor is for the following models:
| Make | Model | Date Range |
| Hot Spot | RLX | 1998 |
| Hot Spot | SLX | 1998 |
| Hot Spot | Round | 1995-1997 |
| Hot Spot | RE | 1998 |
| Hot Spot | SE | 1998 |