I have read through several previous post, i have replaced the heater element. I have checked my high level and it has continuity with the wires removed. I'm unsure of the brand of tub, but the heater control box says hurricane products on it. I bought this tub used, he advised it was working when he removed it from his deck but had some leaks. I have since fixed nearly all leaks, still have 2 small ones. The tub runs on 110v 20 amp, i have checked my outlet and breaker. Im just at a loss for what else could be wrong. When i plug the heater/pump in the pump works at low speed with no heater. If i press the button again the heater light comes on and immediately trips the Gfi. I thought it may have been a flow issue so i removed the filter still no luck. Any ideas?