Fit for MasterTemp 200, MasterTemp 250, MasterTemp 300, MasterTemp 400, SR200NA, SR333NA, SR400NA, SR200HD, SR333HD, SR400HD, 460805 and compatible with All NA and LP Series Pool/Spa Heater Electrical Systems. Replacement NA and LP Series Pool/Spa Heater Electrical Systems & 472610Z Switch Membrane Pad Replacement MasterTemp Pool and Spa Heater Electrical System. First, remove the old circuit board by turning off all power and opening the top of the heater to access the old circuit board. Unplug the membrane pad from the board, then remove the wire connector attached to the old board. Satisfaction Guarantee–100% satisfaction guarantee. Compatible with Pentair MasterTemp NA and LP Series Pool and Spa Heater Electrical Systems, and for Pentair Sta-Rite Max-E-Therm NA and LP-Series pool and spa heater electrical systems. Made of quality material, professional PCB soldering, with anti-oxidation, heat, moisture resistance. 472610Z Switch Membrane Pad 472610Z membrane pad fits for MasterTemp pool/spa heater electrical system switch membrane pad replacement. Replacing the switch membrane pad fixes the heating performance of the system. The buttons on the board are easy to use and their functions are clearly marked. Accurate hole alignment without covering the digital display and LED lights. A replacement can make your heater electrical system like new. Rebuild your Pool and Spa Heater Electrical Systems. Begin by removing the old circuit board by shutting down all power and opening the top of the heater tohave access to the old board. Unplug the membrane pad from the board and remove the wire connectors. Connected to the old b. Unscrew the 4 screws holding the board in place. This will allow you to take the old board completely out. Screw the board back in and plug the membrane pad into the connection that accepts the ribbon cable. Reconnect all of the wire connections and close out your master temp or max e therm heater.