Whining hot water heater
Have a new Coachmen Freedom Express with an Atwood Gas/Electric water heater. I have had this water heater on several other RV's, but this one makes a high pitched whine. Makes this noise on gas or...
Forum Discussion
Seeing as you can hear it from circuit board area and it happens when you turn on gas or electric
It has to do with the DC System (Atwood uses DC to control gas & electric that is why there is a circuit board).
I suspect you have AC Ripple occurring......ac ripple is the result of converter changing AC to DC.
Measure ac voltage on either the White wire (electric) or Orange wire (gas) at connector on circuit board when you turn it on. DC voltage is on those wires...but AC Ripple can be measured using voltmeter set to AC Voltage.
Should be .5-.8 AC Voltage measured....higher than that converter is not filtering.
It has to do with the DC System (Atwood uses DC to control gas & electric that is why there is a circuit board).
I suspect you have AC Ripple occurring......ac ripple is the result of converter changing AC to DC.
Measure ac voltage on either the White wire (electric) or Orange wire (gas) at connector on circuit board when you turn it on. DC voltage is on those wires...but AC Ripple can be measured using voltmeter set to AC Voltage.
Should be .5-.8 AC Voltage measured....higher than that converter is not filtering.
