Cooling Fans not working on a 2000 New Beetle

I have a 2000 Beetle, the cooling fans are not working. The A/C blows but not cold. I have replaced the fans about 3 months ago. It overheated two weekends ago and since then I have replaced the fan control module, the fuse block located on top of the battery, and the thermo switch, with no results. The fans still will not come on. I can short the fans and they will come on. I am also getting a overheating alarm after about 30 seconds of idling. Any help on this would be greatly appreciated. Thanks