I have a Hamilton Beach coffee pot, model 49980 (I believe). I can't find the owner's manual, so I'm not sure of model #. It has a single cup brewer and a 12 cup carafe. We have had it for only a year and have only used it a handful of times during that time period. My question -- is there a way to adjust the heat setting? When the coffee is done, it is at a drinkable temperature -- not hot. Is there a way to adjust this?