Got all the components and put together a controller for my electric smoke hollow. PID turns on and activates the SSR starting out. Temps climb up and over target set on pid then eventually fall back down but way below target then way above and so on and so on........ Not using the auto tune, just plugged it in and set my 225 temp(well actually 107 cause i messed up and this unit only does Celcius) but should still be fine i assume. Could it possibly be bad or am i missing something?