Tuga, my coach does not have Aqua-Hot but it is my understanding that the way Newell wires the Aqua-Hot, you should not be able to run both the Air Conditioners and the Aqua-Hot on AC at the same time. With the Aqua-Hot in the Heat ON/AC OFF position and the Aqua-Hot diesel switch OFF, the electric element should come on as needed to heat the coolant as long as the AC circuit breaker for the Aqua-Hot is turned on. The Aqua-Hot pulls about the same current as 3 Air Conditioners running at the same time.
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