Check the listing for details. Hi Limit Switch Replacement: Pentair MiniMax & PowerMax Heaters: Replace 071017. Condition: New. Listed at 19.99 USD. Replacement High Limit Switch (150°F) for Pentair Sta-Rite MiniMax & PowerMax Pool Heaters Replaces Part No. 071017 & P12848 Compatibility: Pentair MiniMax and PowerMax Heaters Manufactured by Optimum Pool Technologies The two Pentair 071017 High Limit Switches are important switches in your MiniMax or PowerMax pool heaters, and are used to detect when your water temperature has exceeded a safe level (150°F) and immediately opens the heat exchanger outlet when that happens. You MiniMax heater will indicate when it is time to replace the High Limit Switch when the “SERVICE” LED is displayed. It also may be time to replace your MiniMax High Limit Switch if all 3 lights on the back of the control board are on and one or both of the switches shows an open circuit (given proper water flow through the heater). See the troubleshooting section of the MiniMax Service Manual. Specifications: • Manufacturer: Optimum Pool Technologies, Inc. • Model: OPT-017S