Pot keeps shutting off after coffee completely brewed.
This morning we made a pot of coffee, which brewed just fine. But the we got the "beep" that indicates the pot was shutting off -- the one you get after two hours. I tried several times to turn it on again, but after a minute it shuts off. Since it brewed just fine, I hesitate to think it is a cleaning issue. Any ideas?
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Re: Pot keeps shutting off after coffee completely...
This may be an electrical issue, but I would try holding in the on/off button for a few seconds and see if it still displays 2 hrs as the auto-off time. If 2 hrs does display correctly, unplug the unit for 16 minutes or longer - do not plug it back in a single second shy of 16 minutes. Then reset the clock and reprogram the auto-off Try one more time.
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Use a coffee pot cleaning additive (used to descale irons too) and run it through the brewing cycle.. flush it well afterwards with the brew cycle 2X more and it should be fine. Mineral deposits from hard water have clogged the line. Otherwise, get a new coffee maker as the valve in completely closed with mineral deposits and there is no way to open it to remove them and reseal it. An under sink water filter to remove hardness will prevent this from happening again.
I recommend slowly pouring in about a half a pot of cold water without coffee in the filter basket 5 or so minutes before you brew in the morning. There are 2 good reasons to do this- 1. Overnight you are having some evaporation due to the fact that your Bunn brewer has a reservoir that keeps a couple of pots worth of water at brewing temperature... a better temp than most "home" model brewers. This will top off the reservoir and you will not "short pot" except for the amount that the grounds themselves hold back. 2. Also overnight, due to the fact that the water is kept hot, the oxygen can dissipate from the water in the tank. Topping off with fresh water will mean a fresher first pot. The Bunn brewers have a low wattage/keep warm heater so the actual heating element isn't doing all of the work over those long periods... it only kicks on when the temperature in the reservoir drops considerably (like after brewing). Be sure to let the brewer heat back up before brewing (you will hear it stop heating) Hope this helps.
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.
Okay, try this, make sure that everything is cool first, then take a turkey baster full of hot water and vinegar and shoot it backwards through the coffee maker...where the water falls on to the grinds. After that, try running either a commercial coffee pot cleaner or just again, vinegar through the brew cycle with no coffee in there. Try it two or three times, there may be calcium buildup in the filter and pump. You could also try that CLR cleaner, but make sure you rinse the pot out really good, and run a few cycles of just water before you drink anything from it.
These macines have an internal water heater that should be clened periodicly (monthly per manufacturers instructions but I do it quarterly/semianually/when it gets noisy :) ). The machine will have to be disasembled to do this since the tank will have to be flushed when you do this to get the chemicals out of it (vs running a pot of vinegar through your Mr. Coffee machine at home), Depending on how much scale has built up in the tank this could take several cleaninings. Scale deposits can over time impair/damage the heater or thermostat but replacement parts are cheaper than a new machine and the machine will outlast and outperform a standard coffee maker. BTW, my 8572 3 burner was built in 1972, I bought it at a flee market for $25 10 years ago put $100 in parts to get the push to brew and hot water on tap working again and it made two great pots of coffee this morning.