02suma

Currently the spa turns on, the ready light turns solid green regardless of set temp (not blinking). Board shows limit ok lit green, heater on lit red. Heater doesn't appear to be running. Circ pump running and water definitely flowing. Temp sensors ohm reading matches chart. I had just repaired a leak, I realized days later that the spa had been running with low water and thermal switch on the no-fault 6000 heater had tripped. I will check relay output voltages today. What leads (green white black) do I measure resistance across to check heater? The solid green ready light with a temp sensor within spec for resistance test is throwing me off, I'm really hoping it isn't the board or the control panel. Any diagnostic help is greatly appreciated!