I have a Pentair Mini Max pool heater for my pool and spa with an EZ temp control panel . I switch from com pool 3800 a few years ago . This year I opened the pool and the spa control is not working right I have to turn the heater on in either spa or pool for it to fire up but when I shut the spa from the pool side switch the heater keeps running even with the valves returning to normal pool mode . What am I missing it all worked fine lasy year .