I have already replaced all sensors and the thermistor twice, so its not those. So the problem is when the heater is not running the temperature of the actual spa and the heater unit are the same(working). As soon as the heater begins running, the spa temperature will begin rising and the heaters display temperature will drop. For example the spa will be at 101 and still climbing, while the heater reads it at 80F, and therefore thinks it needs to keep heating to reach a set temp of 99 as an example. I originally found this out when I set it to 100 and the water had actually reached 108, with the heater still running and its temperature showing 88F. It feels like its a valve mixing issue or something along those lines. When the temperature in the unit heats up a bypass opens, but this water is mixing in the temp probe area, cooling it down. I've tried to look at diagrams of the manifold, but this mixing doesn't really make sense. As of now I'm stuck. Does anyone have any ideas or thoughts on the cause of this issue? A flow issue? Broken Manifold? Maybe the board(doesn't seem likely)?
When trying to research it seems most people have the opposite problem. The display temp is hotter than the actual, and therefore the heater won't kick on. Mine is the opposite.
When trying to research it seems most people have the opposite problem. The display temp is hotter than the actual, and therefore the heater won't kick on. Mine is the opposite.