Balboa GS501SZ Circuit Board P/N 54516-0254516 02 Balboa.. GS501SZ Circuit Board .. pump 1 dual speed , blower pump 2 , ozone , light + Balboa GS501Z Circuit Board PCB (55447 01) Canadian Spa Co. Hot Tub Spa Part This is a Canadian Spa Co. Marked part and is only to be used in conjunction with there matching Topside Control Mode 501SZ tech sheet Mode is changed by pressing Warm or Cool, then pressing Mode STANDARD Mode maintains set temperature. will be displayed momentarily when you switch
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