The dealer took a look at my furnace the same day (yesterday) I dropped it off. This morning at 8:30am, I got a call and was informed that my TT was ready for pickup. They did the repair late yesterday afternoon but wanted to let the furnace run for a while this morning to make sure it was working properly. It turns out that the control board was no good. They repaired it with an in stock part. I ran the furnace for about an hour after I brought it home. It works great.
I have to say that the service was completed much sooner than I anticipated. I would give the service department 5 stars.
The company is called Scenic RV Center. They have two locations in Slinger, WI and Baraboo, WI. I am not affiliated with them at all except for being a very satisfied customer. I guess that I am lucky to have good customer service only 7 miles from my house.