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I just picked up a 1998 Dakota Skyler with a 4kW heater controlled by a Balboa LiteLD CCAJ board. The heater wasnt working, was corroded... I replaced it with a new 4W coil. Still no heat. Temp probe is good, pressure sensor is good. I'm wired on 240V. Pump works on both speeds. Supply AC is correct. Heater measures 120VAC above ground on BOTH sides when call for heat is on (heat light on panel on). Both sides of heating coil are 120 V above ground, 240 V above black, and 0V above red. Thus 0V across the heater coil and no heat. So both sides of the coil are electrically connected to red and no voltage difference across them. I pulled the board out. It has 5 relays. The coils on 4 of them measure about 260 Ohms each, and one shows no continuity. Thus I presume a bad relay (th ed relay that connects to one side of the heater coil). The contactors on the relays work fine, as each tested well with a meter. I reinstalled the board and manually tripped the relay that I suspect is dead. However that did not change the voltage readings across the heater as I hoped it would. I've ordered a couple new relays. But I could use some advice!! What can anyone recommend? It would be much better with heat!! Thanks much!! Eric