Please contact Customer Support at (800) 352-BUNN (2866) in the United States.Click to see full answer. People also ask, do Bunn coffee makers have a lifetime warranty? LIMITED WARRANTY Bunn-O-Matic warrants the BUNN Pour-Omatic® Coffee Brewer (“Brewer”) to be free from defects in material and workmanship existing at the time of manufacture and appearing within one of the following warranty periods: a) Three (3) years from the date of original purchase of a NEW BREWER. how long does it take for a Bunn coffee maker to heat up? about 15 minutes Furthermore, does Bunn make a 4 cup coffee maker? This BUNN brewer is advertised as “the fastest brewing machine” and this largely comes down to the fact that it keeps its water hot 24/7 so that it’s always ready to brew. If you want to make between 4 and 10 cups at a time in under 4 minutes, this is the machine for you. Especially if you want your coffee fast.How much water do you put in a Bunn coffee maker?Fill the carafe with 4-10 cups of water. Pour the water into the brewer. Turn on the warmer, unless you are using an ST or BT model. Close the lid to begin the brewing process.