Originally Posted by BonanzaFlyer
I located the E-plex module (PN 303TM) consealed in the narrow space below the bottom of the cabinet above entry door. I had to pull up the carpet covered board that was stapled in. It turned out that one of the four ribbon cable wires was broken from what appeared to be caused by the wire chaffing against the lower panel board that it passed through. I was able to solder them together and then wrap with heat shrink tubing. It is back to displaying the correct temperature.
This fix avoided having to purchase a replacement module from Newmar which they have priced at over $500.
Still having issues with mine and Silver leaf says it is not a module issue on their side as all the Silver leaf module does on the NA is to read the temp from the AC control board which receives the temp from the sensor.
After changing the sensor out twice someone posted theirs was a splice issue on the sensor located in the belly and if that is not what it is it is the control board on AC. It appears to be somewhat intermittent so I am guessing it is the spice.