I have a true GDM-10. It’s one of the smallest glass front merchandisers they make. It’s a ten cubic foot. It’s one of the only ones that will fit through an antique camper door. My Trailer is a 1949 Shasta. It’s a mini at eleven feet including the tang. It works great. I bought a second one for my truck build used and it is only working half the time. I found that the fan in the top isn’t always blowing. I am able to get it to work again by knocking the blade around and helping start to turn. I need to replace the fan motor but can’t figure out which of the three standard motors it is. Any one with any idea?