I have a 2005 D1 Aurora. The circulation pump went out. Shut down spa and drained. After 1-1/2 years replaced circ pump. Now when I start up spa don't see any bubbles coming from ozone discharge in spa. Also when I started the spa the pump 1 came on. If I lower temp below water temp pump goes off. If I raise temp pump 1 goes on. I see no movement of the flow switch. Any idea whats wrong and how I can fix it.