Technical service bulletins are instructions a manufacturer sent its dealers about a known fault. They are not recalls and the work is usually not free, but they are the clearest signal of a problem the manufacturer already knows about.
SB-23
Service Bulletin/Repair Instructions
TIFFIN MOTORHOMES SERVICE CAMPAIGN: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. A WIRE IS NOT HOOKED UP AND NEEDS TO BE. THE NAVIGATIONAL SYSTEM WILL WORK UNTIL ITS PROGRAM FOR A DESTINATION AND GET THE PATH TO THE DESTINATION. CSC LETTER WAS RECEIVED. *PE
SB-20
Service Bulletin/Repair Instructions
TIFFIN MOTORHOMES: THERE IS A POTENTIAL PROBLEM WITH THE WATER HEATER BY PASS IN YOUR UNIT. THERE IS A POSSIBILITY IT WAS INCORRECTLY PLUMBED. CSC LETTER WAS RECEIVED. *PE
SB-21
Service Bulletin/Repair Instructions
TIFFIN MOTORHOMES SERVICE CAMPAIGN: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. SWITCH BOX GROUNDING LUG. THE TAP SCREW IS NOT TIGHT ENOUGH. THIS COULD CAUSE PROBLEMS AT THE LOAD CENTER CAUSING A LOSS OF GROUND. CSC LETTER WAS RECEIVED. *PE