High pitch noise with coach and chassis disconnected

[illinibill]

Have a 2013 Sightseer 33c, even with both chassis and coach switches off, still,have a slight noise in center of coach. Help?

[grtharris]

illinibill, are you connected to shore power?

[GlenB]

Inverters make a hum noise...you said you cut off switches was one of those the inverter GlenB

[illinibill]

No, we do not have shore power where we store the coach. Other question regarding the inverter. It has a huge power area with all kinds of procedures automatically switched.

The inverter indeed might be the problem. This coach is a 2013 but brand new to me. The inverter is the lowest of the gauges on the panel. It was showing 13 volts and I "assumed" it would go out after a time delay. Wrong????

We will actually take the coach out for its first trial run this coming Monday.

[j.smith]

On our Suncruiser there is a battery disconnect switch for the inverter separate from the chassis and house disconnects. It is located in the compartment with the inverter.

[Rocky Larson]

My Atwood water heater control board (on the heater) makes a constant high pitched hum when on, gas or electric it doesn't matter, if it is heating is it humming. Only I can hear it. DW and repair techs can't.

[GG1]

I have a high pitched whistle that fades out in a second or two when I switch off the coach batteries. I also had a Journey that did the same thing I think its the carbon monoxide detector.