This is a Pentair Pro Service Water and Electrical (All) Systems repair package for the MasterTemp and Max-E-Therm pool heaters.
The package contains many parts: Fireman’s Switch Fuse, O-ring #2-226, Membrane Pad, Ignition Control Module, Thermistor, Water Pressure Switch, Air Flow Switch, High Limit Switch, Transformer, Control Board, Stack Flue Sensor, Automatic Gas Shut-Off Switch, Manifold By-Pass Valve, Thermal Regulator Kit, and the Igniter Gasket.