Description
Coast Spas spa pack circuit board in the 51SZ version for replacing failed control electronics. It interprets keypad input and powers the pumps, heater and lights accordingly. Order this when diagnosis points to the board rather than the heater or wiring. Photograph the old connections and compare the board label carefully, as similar board numbers are not interchangeable.
Search: 51SZ spa board, hot tub control board, spa circuit board, replacement pack board