I am currently working on the heat exchanger that services the vents in the dash & salon. My fan has not worked for this zone since I purchased the coach. It appears the motor is bad. For any one who may have this problem in the future the heat exchanger is a Komfort EXX-D16-200. There is a motor kit that is available- Komfort EXX-D15-241. The cheapest prices I have found on AquaHot parts is from this guy who I have bought from before:
http://www.parts.rvhydronicheaterrepair.com/
If anyone has replaced this motor on this heat exchanger & has a set of procedures I would sure like to have a copy.
Thanks...........................