Report Gecko revival in Portable Hot Tubs & Spas Posted December 2, 2021 17 hours ago, CanadianSpaTech said: Need to see the other half of the schematic. Lets start with the red wire with the electrical tape on it. It is for either pump 1 hi speed or the low speed. If it is the low speed wire then the spa won't circulate through the heater and will send an error to the topside in the form of 3 dots flashing in between the temperature numbers. I notice the Hi Limit (bottom right of the circuit board with the yellow ATTN sticker on it) is loose and not making good contact with the heater tube. I would say the heater tube is what isn't fitting properly. The Hi limit tape should be squeezed in between the heater tube and the blue part of the spa pack housing and fitting tight/snugly to work properly. I've got the tube tightened in, and that bit with the yellow sticker squeezed in tight. It looks like the red wire should be going to the high speed... relay(?), but the black wire (low speed) is going there instead. It also looks like something may have burned on that low speed connection.