WOW...this is odd! Just this morning I discovered the same issue on our Norcold 1210.
I noticed it because I saw some brown substance around the top button on the door frame. Closer inspection revealed the plastic had burned and was partially melting. The metal button was actually HOT to the touch...NOT GOOD!!
Discovered the same info you did in the service manual and Norcold was NO help whatsoever. They tried to say there was something wrong with the electrical wiring in my coach...they were clueless. It is obvious that when these pins do not make proper contact they cause a heating issues at the contact point. They wanted me to pay to have my coach checked out for electrical issues.
Think it won't be long and I will be installing a residential unit...will NEVER own another Norcold
