Aqua-Hot RV fault codes

Aqua-Hot hydronic heating systems provide heat and hot water in larger RVs. The control board shows numbered fault codes / blink counts for burner and sensor faults.

Furnace

Fault Code 0 (1 blink)
The diesel-burner indicator light is not lit even though… Fault Code 1
Low supply voltage detected by the diesel-burner control… Fault Code 8
The burner failed to ignite on its initial start attempt… Fault Code 9
Re-ignition failure. The burner lit and established a fl…