Jandy PCB 7588C Heater Control

JANDY PCB 7588C is a temperature‑controlled heater control board used in LT pool and spa heaters. Common failure points for this class of boards include burnt or cracked I/O traces, failed MOSFETs or relay drivers, and degraded power supply decoupling capacitors that can cause erratic heating cycles or no output. First‑check diagnostics: verify 24 V DC input to the board, inspect all solder joints and component integrity visually for signs of heat damage, and confirm that the heater relay contacts are switching correctly by measuring voltage across the heater terminals during a control cycle.[oss-gpt-20b]

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We specialize in the repair and refurbishment of high-end industrial control electronics and power systems like this unit.

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