Where is good site to get a maytag refrigerator repair manual?

Our freezer is working, but the refrigerator section is warm. Others have suggested that the fan is not blowing into the fridge section. We have unplugged the fridge overnight to thaw it out if there is any buildup. But alas, the problem persists. We suspect the fan motor is burned out. Where is the fan located in the fridge unit, and how do we get at it to replace it? Maytag site does not have our model number. It is an Admiral HMG79143. Any help is much appreciated!!