When I started it up it ran compressor and fan about 1 minute and alarm went off, compressor stopped but fan kept running. Manual details several internal filters. So I unhooked the filters (each separately and tried a restart. But no change. I was looking for a repair shop and found this site. I bought this machine used so don't have anywhere to return to for service. Hope someone can give me ideas and I don't have to buy a new one.