Hopefully somebody can help me out. I have a 3-5kw heater above model and its single phase 240v. I have wired it and it won't come on. I also have a marley m602 external 240v line voltage double break thermostat wired to it just like the wiring diagram on the heater shows it and still don't work. I have checked continuity through the overloads and those are ok. The thermostat has 4 wires 2-red for line and 2-black for load. The wiring diagram shows that one black wire goes to h1, one red wire goes to h2, the other black goes to p1 and the other red goes to p2. done all this and nothing. probably something simple hopefully.:furious:. Thanks in advance.