Hopefully, when they called you, they also offered a $50 gas card for having the recall work done. I received my certified mail rebate form just yesterday to fill out once the work has been completed by the service department. You have to send the form in along with a copy of the service work order.
Also, this extension is only so they can install an electrical thermal switch sensor into the burner unit to shut down the refer if it detects heat over a certain temperature. It is a lame fix for a more severe problem, and that is the thousands of previously installed defective cooling units, some of which have caught fire and destroyed the MoHo's. The original 2 different recall's back when they first discovered this problem covered the replacement of the entire cooling units, however they soon realized that it was going to end up being a very expensive recall for them, so they came up with this "alternative fix". Yeah, right!
Needless to say, I am having the unit installed on my current cooling unit, #1339959, and once completed, I have already purchased a brand new cooling unit from RV Cooling Warehouse built by the Amish that will be installed sometime before I leave for Alaska next May. The "alternative fix" will be removed from the old one and re-installed on the new cooling unit.
Well, at least the $50 gas card was worth the trouble of having it done. It takes about 1 1/2 hours to complete the recall installation.