the fan on my air conditioner is not working. it was given to me. i cannt find a model # on it anywhere. i used it for about 4 hours then it stopped and the fan doesnt work anymore. i have a serial # and thats it. i really need it working. itsthe only one i have. i have kids in my house and its really hot here. please i really would appreciate your help. thank you, Aurelia segovia