Sundance spa temp reading 130 + - sensor problems
I have a sundance spa and i just filled it up yesterday after it sat drained all winter. I am wondering if anyone knows a way to test these temperature sensors because it is reading 130 degrees and i know the water cant be hotter than about 90. I know my display and my board are good as i get the proper error codes when i disconnect the sensors. the thing gives me an error ---- which means 'spa has detected a problem which could damage blah blah contact manufacturer' I also get an interlock failure code too sometimes. I am hoping it is just the temp sensor,It seems to shutdown and go into the '----' error when it senses dangerously high temps. i have located it and i know it will be easy to change after i drain about half the water... any input, or advice ?