How to Test: If your old Starite or Pentair Mastertemp Control Board no longer starts up your heater or the display no longer illuminated then the board needs to be replaced. Compatible With: Pentair Mastertemp 400 parts, SR333NA, Mastertemp 300, SR200NA, Mastertemp 200 and Pentair Mastertemp 125 Low Nox Pool Heater. This includes all HD heaters as well. How To Install: Unplug the membrane pad from your Pentair Pool Heater Parts and remove the wire connectors connected to the old Pentair Mastertemp 400 Control Board. How To Install (2): Unscrew the 4 screws holding board in place. This will allow you to take the old board completely out. Screw the Pentair pool heater control board in and redo all the connections. Includes: This control board kit includes a replacement board mastertemp 400 (42002 0007s) and 4 screws that help hold the Pentair Mastertemp parts in place.
