I have a 2006 sprinter and the air will work great or not at all. When I start it and it is not blowing cold, I can keep restarting it until it works. I am sure the problem is electrical, was hoping someone new right what to check first. I am new to this forum but have followed it for some time. Thanks to all that have posted on the different problems, it has been very useful and saved me a ton of money!