Velocity Truck Centers for engine air heater repair

As we were arriving in Phoenix, we got a Check Engine light on our dash. Never a welcome occurrence! Looking in the BlueFire app, it showed more details of the codes; clearly a short of the engine intake air heater: Later in our stay, we started the engine again to see if the codes were still there. They were, so I contacted NIRVC to see if they could fix it. They referred me to Velocity Truck Centers, which is a Cummins dealer, and has an RV department. Travel route, heading south then back north afterwards: Our appointment was for 7 AM; we considered arriving the day before, since they had a few full-hookup spots, but decided to just go very early in the morning. Probably a good thing, as their RV department was very busy that day; there may not have been a spot for us. We toaded up just before sunrise: Sunrise: Exit to the truck place: A hot air balloon in the distance: Arriving at the truck service center: Velocity Truck Centers: The RV waiting room was so crowded that one couple…