Hello, first time poster here, I'm hoping someone can help me out. I have a hot tub heater (watkins no fault 240v 6kw) that isn't heating. The odd thing is most of the information I have found online, as well as the hot tub manufacturer tech support, claim that this heater will work at 120 volt at 1500 watts. That's the way it currently wired. I have 9.6 ohms resistance through the heater, 119 volts, and it's drawing 11.75 amps. Yet it still isn't heating. Tech support said that it sounds like the heater is bad, but it doesn't make any sense to me that all the electrical values are in acceptable range. I'm curious if the heater is only good for 240 volt installation, as that is what the tag says. Tech support told me it would work either way. Do any of you guys have any thoughts on this? Also, the circuit board and relays appear to be doing what they should. the indicator light is on that calls for heat and I have power where it should be. Any input will be greatly appreciated! Thanks in advance!