I have recently received a 1995-96 Tiger River Manora Spa. Everything works (circ pump, jet pump, lights) except it wont heat up. I've done some testing and it appears no power is getting to the heater (NF6000). I've also noticed that the top side control board has some corrosion on it right next to the temp control dial. I'm not sure if I should replace the control borad, or possibly have a bad relay? Both Thermistors for high limit and thermostat have been replaced.
any suggestions and I thank you in advance.
Update.... Just found out that before the spa stopped heating, it would sometimes overheat. Last time this happened, the person shut it down for a couple days then turned it back on. Now no heat what so ever.