I am have a RC-5500 that has blown 3 fuses over a period of 1 year. The fuses that are blowing are the ANN-400. A tech came out and messed with the settings and turned on a fan to keep the control module cool. He made it so the fan is on permanently while the Truck is running. Ten minutes after he replaces the fan and makes adjustments to the settings for the fan he leaves. The Crown ran for 10 minutes and then died. It is super slow and at a crawl for forward and backward. It will turn in a 0 degree turn at full speed but will not allow you to move forward at any speed above a sputter. We call the tech who has very little experience and he came out and diagnosed the truck. He claims that one of the drive motors is blown and needs to be replaced. The truck is under 2 years old and only has 1400 hours on it. What do you think it could be?