Raypak 601588 board

Raypak 601588 is the RP‑2100 digital display control board used in Raypak pool and spa gas heaters (model range 2004–present). Common failure modes for this board include a dead or flickering LCD, loss of communication with the heater’s temperature sensor, tripped power‑supply fuses or blown main relay contacts. First‑check diagnostics: verify the 120 V AC input and confirm the board’s 12 V DC rail is present; inspect the LCD backlight resistor and display driver IC for burn marks; review any stored error codes on the heater’s diagnostic port (e.g., “E01” for sensor fault).[oss-gpt-20b]

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