Make a 1/2 pot 50/50 mixture of cold water and white vinegar then run it through the machine in normal brewing fashion. Place a clean filter in the brewing cup to catch the white deposits that are removed. Allow the mixture to cool, then repeat the process several times while using the same filter. Finally, run several pots of fresh water through to work out the taste of the vinegar. Repeat whenever the brewing time seems to be excessive.
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My Bunn brews coffee just fine in the morning, but if I try to make another pot within a couple of hours the coffee is warm but not hot, thus I think the heating element still works but why is it so slow to heat the water in the reserve tank for the next pot?
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