Hello I have a Torchmate 4400 that is making a growling noise when starting up the first time of the day. It sounds like a cooling fan going out. The sound stops and the controller seems normal after about 20 to 30 seconds. The sound returns the next day or later. Has anyone had a similar issue or replaced a fan in the Accumove controller. I contacted the tech department, they said blow it out with air. It sounds like there may be a little more to it. I would appreciate any advice. Thanks, Gary.