Norcold 811 fridge not working on A/C
I had a guy hook up a 30amp plug at my place the other day and when I plugged my RV into it, I found the AC wasn't working. He apparently made a mistake and reversed the neutral and hot wires in the b...
Forum Discussion
If you have the cover off the control board, check for 120V across the AC_HT (LO/HI) pins where the electric element plugs in while the fridge is on in AC mode. If you don't have 120V there and the 8 (7.5A) fuse is still good you may have a bad AC relay. If you do have 120V on those pins and the fridge still isn't cooling, you may have a bad electric element. You can test that with a ohm meter with the power OFF by measuring ohms across the same AC_HT terminals. It should measure ~40-50ohms.
The AC side is fairly simple with the power cord coming in routing one terminal direct and the other terminal through the fuse and relay to the heat element.
Our 621 model fridge intermittently failed on AC 5 years ago. I fixed it with a $2 relay replacement. https://www.rv.net/forum/index.cfm/fuseaction/thread/tid/29727778.cfm
Service manual for your fridge here if it helps: https://norcold.com/wp-content/uploads/2021/09/OM_N61N81_635485D_20210902.pdf
The AC side is fairly simple with the power cord coming in routing one terminal direct and the other terminal through the fuse and relay to the heat element.
Our 621 model fridge intermittently failed on AC 5 years ago. I fixed it with a $2 relay replacement. https://www.rv.net/forum/index.cfm/fuseaction/thread/tid/29727778.cfm
Service manual for your fridge here if it helps: https://norcold.com/wp-content/uploads/2021/09/OM_N61N81_635485D_20210902.pdf
