mrwrick Posted February 29, 2016 Report Share Posted February 29, 2016 Would it be a suitable test of the heater system to place a new heater into a bucket of cold water and plug it into the spa control outlet for the heater, turn on the thermostat and see if the heater warms the water in the bucket, like a makeshift tub? I happen to have a new heater I did not think I needed. If the test heater does work, being controlled through the thermostat and relay system, as I hope it does, it would show that it is the heater and not the system components inside the control box that is bad. Would make for a much simpler repair. Of course, if the new heater will not work in this scenario then it is in the power system that the problem lies. Please give your opinion. Thanks Quote Link to comment Share on other sites More sharing options...
Dr. Spa Posted March 1, 2016 Report Share Posted March 1, 2016 I'd have an EMT with a defibrillator standing by. Quote Link to comment Share on other sites More sharing options...
mrwrick Posted March 1, 2016 Author Report Share Posted March 1, 2016 Paramedics were not needed. I retested the installed heater at its plug and got 9.8 ohms, so I am OK with the heater itself. Then I tested for voltage at the heater outlet. The thermostat was set on medium, no voltage. Today I got energetic and pulled out the control box. I repeated the voltage test, but with the T-stat set to OFF, bingo, 120 volts, and of course it went back to zero when the T-stat was turned up! So, I have something hooked up backwards. What to do to find and correct this problem. Funny thing is, it feels good to have gotten to this point. Thanks for helping me. Quote Link to comment Share on other sites More sharing options...
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