OHi there! Need some help. Removed Tstat from our 1995 Grandee G, with part label #31080. Found replacement Tstat on eBay for TigerRiver or HS spas, with part label #75077. Instruction sheet says plug & chug for TRiver, but if HS, use a jumper wire provided to ensure proper connection to AC vs DC side of rectifier. Big hint is whether there are orange wires or black wires. The two spade-clipped wires I pulled to remove old Tstat are one black and one light blue. There are two stickers on new Tstat, one reads 2.0 VA @ 110VDC, or 3.0 VA @ 28VDC. My instinct tells me to power up breakers and check for voltage across the black/blue spades for AC or DC. Further, instructions say if no orange wires, skip mult steps and go to 12: attach the black jumper provided between Tstat and heater relay coil rectifier. Sounds easy enuf, but I wanna be more confident about this change-out. Any experience with this procedure, and any advice? Thanks!