Balboa Circuit Board - INF107 VS501Z (54357-03) airsupply 3" diameter wet end format

3" diameter wet end format

Designed for XP2 48 frame applications

8 conductor design with 1-to-1 connection mapping

It converts motor energy into hydraulic performance

and that starts with the sensor assembly that relays water temperature back to the system

Balboa Circuit Board - INF107 VS501Z (54357-03) airsupply 3" diameter wet end formatA circuit board like this INF107 VS501Z replacement matters because it restores the control behavior the spa was originally built around. When that central board begins to weaken, the system often starts acting in ways that seem random at first. Heat may drift, pumps may not respond consistently, and the overall pack can feel like it is slowly losing its stability. Replacing the right board solves that problem at the point where it actually starts.