Wall K Posted March 9 Report Share Posted March 9 Hi there, I am the owner of Sundance optima 850. I do not know how olde since it came with our house. Flo and flo2 error appears on screen. I replaced flow switch changed filter and still keep getting these errors. The thing is that flow switch has only two wires coming out of it and when I disconnect one everything goes back to normal. Any ideas what’s causing this problem. Thank You. Quote Link to comment Share on other sites More sharing options...
cranbiz Posted March 9 Report Share Posted March 9 When you replaced the flow switch, did you install it correctly? Wouldn't be the first one that was installed backwards. 1 Quote Link to comment Share on other sites More sharing options...
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