Wall K Posted March 9, 2023 Report Share Posted March 9, 2023 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, 2023 Report Share Posted March 9, 2023 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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