My Maxx Envie hot tub is 450 gallons. Topside controller has six buttons pump 1 (two speed), pump 2, blower, temp up, temp down and lights. Recently when I pressed the blower button nothing happened. Then when I pressed pump 2 (1 speed) as soon as it starts pump 1 comes on in low speed. I replaced both my topside controller and circuit board last year.