The Jandy Industries 8124A/8125 Control Module is a Power Center PCB used to manage pool and spa equipment such as pumps, heaters, and lighting. Common failure modes include loss of power to the filter pump module, blown or tripped fuses (often the 3 A fuse on the board), and intermittent operation due to faulty relays or damaged circuit traces. Initial diagnostics should verify a stable 25 VAC input at the PCB terminals, confirm that the main fuse and any auxiliary fuses are intact, and visually inspect for burnt components or loose connections around the relay contacts. Check the status of the filter pump module itself—ensure it receives power from the board and that its own internal fuse is good—and review any error codes displayed on the Jandy interface to pinpoint a specific fault.[oss-gpt-20b]