I also had the same issue when I bought my 2001 32v.
If your floor plan is the same as mine, try this.
Remove the front floor heating vent cover...2 screws.
Carefully reach your arm into the duct towards the water heater side of the unit.
If you get into the duct far enough, you may feel the 'birdcage' for the fan.
Try rotating this fan. You may feel that the fan 'hits' the housing wall in which it is located.
So, Failure mode is: The birdcage has moved a little on the drive shaft and is now in a position to hit the wall of the housing when it turns. This results in an increase of resistance = increase in amps = fuse blows when it exceeds its design capacity.
I did the repair procedure years ago. It can be a little difficult, BUT having the Coach Heater is one of the BEST ASSETS of my unit.
As we leave the cold north in the winter, we never have to wear coats and our coach is always warm....front to back.
When we stop for the night in a cold or cool climate, we just 'kick up' the coach heater for a while before we stop and we have a warm and cozy unit ready for our evening meal and sleep.
2001 Winnebago Adventurer 32V, Ford F-53, V-10
2008 Jeep Grand Cherokee Limited, 4.7L V-8 QTII
U. S. Army Vet, In God We Trust