Re this spa, spent $700 for repairs and all new inside boards etc. about a year ago. Now, it shuts off after a few seconds of resetting the gfi. Troubleshooting - says overheating (OH message) but this is not correct status as the temp is only about 80 now tho message board shows at 112 degrees so I am guessing that is why it shuts itself down - computer believes it is overheating- so perhaps faulty sensor or computer board or. . ? I don't want to spend another $700 but am handy and want to know if I can buy new equip and "plug and play" myself. If so, what do I need to order/get and what tips/help re doing so. Thanks. I am brand new to this site/forum. Looks like a great place to start.