Dennis b mooney

Your right I did confuse them. I replaced both sensors. Hot tub still won’t heat unless lowest setting of the jets are on. Green light still flashing on main control board. I believe it says ready next to it. And the heater light is solid when the jets are on. If I plug in the high limit wire that I wired together the heater light flashes and another red light to the left of the heater light and the right of the ready light comes on. When all keys are shut off I still have good flow through the water fall feature and lots of bubbles from bottom of tub. Only thing I can think of is it may be a short somewhere in the main board or the heater control board. I am at a loss.

I have a 2012 vanguard spa that sat for 4 years in storage. We set up and filled the spa as recommended through the filter housing. I have tried wiring the high limit switch together at the board. Does not work. Circ pump is flowing and waterfall is running water and ozone is coming from bottom of spa. Tested heater and it reads out at 10 ohms. Also replaced the two sensors as I felt that was a inexpensive maintenance type item. All pumps work with no leaks but the ready light flashes all the time and if I leave high limit wired together the red light flashes all the time and the heater never turns on. When I run the jets the heater light will stay on solid red until I shut the jets off. But still no heat. I do have a new heater that I am prepared to install but the old one seems to be tearing out ok. Also the new heater does not have a high limit wire on the end as the original one does. Any help would be greatly appreciated. thanks, dennis b Mooney