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What vehicle is this in? And I will make the phone chat offer for you. Once accepted, it will allow me to talk with you about this. No time limit or limit to number of calls about this.
I am enclosing a link to the Norcold Service Manual which should cover this model. Print out a copy or at least Bookmark it so you can come right back to it again any time. http://bryantrv.com/docs2/docs/ncolddedc.pdf
Also attaching a link to the exploded view of this and parts list.........http://www.laurelhurstdistributors.com/parts/refrigerators/norcold_acdc_DE740-EV740.html