Jacuzzi and Sundance Spas hot tub sensors

Listed here are the main temperature and Hi-Limit sensors installed on hot tubs manufactured by Jacuzzi and Sundance Spas.

• A temperature sensor, as the name implies, is used to detect the water temperature, which is indicated on the spa's keypad.
• An overheat sensor (called a "Hi-Limit" sensor) is a safety device programmed to activate when the water temperature exceeds 40°C, the maximum temperature on most hot tubs.