I just got this unit. When I ran water through in the beginning, most of the water backed up in the filter basket. So I tried to brew a few cups, and the same thing happened, backed up in the filter basket. Is there a plug or something that needs unplugged. I used one of the paper filters that came with the unit each time.
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Perform a full descale. Take out the water reservoir and remove the Anti-calc filter. Put in 500ml (1 pint) water with 3-4 tablespoons of white vinegar (or apple cider vinegar). Put the water canister back in, the turn on the machine and press the manual button. Allow half of the liquid to go through, then stop. Leave the machine for about ten minutes, and then run the rest through. Empty the water reservoir and rinse, put back the Anti-Calc filter, put in another 500ml and press the manual button to flush it all through.
Sorry to say but that is pretty normal. One trick we did is after making the espresso for the day, we emptied the portafilter basket of grounds, then put the portafilter back in the machine and ran the pump. Once we had water coming from the portafilter, we loosened the portafilter back and forth a couple times and this would clean the gasket and brew head. The gasket is very important and a dirty gasket can lead to trouble down the road.
Make sure your sprayhead is the proper one (5 hole) and in good shape. Also make sure that the hole on your filter basket has not been partially closed. This can happen if you set it on the hot warmer. As a last resort, you can slightly enlarge the hole in your filter basket.
Try taking the filter out, and turn the sprayhead off the unit. Put the basket back on, and try pouring clear water through the unit. If the water runs through fine, you either have a plugged sprayhead or are using too finely ground coffee. Look at the holes in the sprayhead, and make sure that none of the holes are plugged. If the basket still overflows, try using a drill bit to make the hole in the funnel a little larger. Good luck.
These tanks can't actually be overfilled since all water poured in displaces the exact same amount of water coming out the spout. So, whatever amount of water you pour in, will be the same amount of water that flows to your pot minus the amount absorbed by the coffee grounds and filter.
Your problems sounds like an undersized (Non Bunn) filter, or clogged brew basket. To verify this, try pouring in only half the water for your brew cycle and wait for it to finish dripping, then pour in the rest. If no overflow has occurred, you simply have the wrong type of filter. If overflow begins again, you have a clogged brew basket, since no Bunn can flow too fast for the brew basket to keep up with it.
This is because Bunn filters are manufactured differently than generic store bought paper filters. They will flow faster, brew cleaner and stand up better than normal generic filters. Remember, Bunn makes their OWN filters for good reason. They made the first, best paper filters for drip coffee pots, and all others are just generic dioxin gas producing paper.
From the manual I found online here.
COMPLETELY CLEAN AND DRY
ALL PARTS AFTER EVERY USE.
Always turn coffeemaker OFF and
remove the plug from the electrical outlet
Open the reservoir lid*. Remove the grinder
basket lid by using the recessed area on
each side of the lid. Then remove Grinder
Basket. Open Filter Basket Door. Remove
Filter Basket Cover, Filter Basket and Filter
The grinder basket, grinder basket lid, filter
basket and filter basket cover can be washed
in warm soapy water and rinsed thoroughly, or
cleaned in the upper rack of the dishwasher.
Dry all parts after every use.
Do not put any water in the unit once the
grinder basket has been removed. Wipe the
area under the grinder basket with a damp
cloth. If water gets into the grinder motor,
the motor may become damaged and
Decalcification refers to removing the calcium
deposits which form over time on the metal
parts of the coffeemaker.
For best performance from your coffeemaker,
decalcify the base unit from time to time.
The frequency depends upon the hardness
of your tap water and how often you use
To clean, fill the water reservoir to capacity
with a mixture of 1/3 white vinegar and 2/3
water. Turn the coffeemaker on by pressing the
ON button. One cycle should be sufficient to
adequately clean the coffeemaker. When the
cycle is completed and the five beeps sound,
turn coffeemaker off. Repeat operation, this
time using fresh cold water.
Allow the unit to cool completely and unplug it before cleaning. use a sponge dampened with soapy water to clean the outside of the coffeemaker, then dry carefully.
Open the reservoir cover and the filter compartment. Remove the coffee grinder lid, the grinder, the filter basket, its cover and the support.
Wash the pieces along with the measure, the carafe and its lid in warm, soapy water, rinse thoroghly and dry. Then replace them in the unit.
All these pieces are also dishwasher safe.
Never pour water inte the unit when the grinder is not in place.
Wipe the part under the filter basket and the heater plate with a damp cloth.
Do not wipe the inside of the reservoir as this may leave fabric or paper residue.
Do not use abrasive sponges or cleaning agents as these could damage the finish.
NEVER IMMERSE THE BASE OF THE UNIT IN WATER OR ANY OTHER LIQUID.
The reservoir cover may also be removed to facilitate cleaning.
Descaling. Over time and through normal use, lime deposits will build up. Scale can interfere with the fine mechanics and give the coffee a harsh, bitter taste. For reason, your coffeemaker should be descaled regularly to guarantee good coffee. The frequency of descaling depends on how hard the water is and how frequently you use the coffeemaker.
To descale, dilute 30cl white vinegar in 30cl water, pour the mixture into the reservoir and begin a brew cycle.
Then run two full cycles by filling the reservoir with water (but no coffee) to rinse the system.
To clean your coffeemaker:
1) Pour four cups of undiluted white household
vinegar into the water reservoir.
2) Place a paper filter into the removable filter
basket and close the brew basket lid.
3) Place the empty decanter on the
Make sure to accurately place the
decanter on the warming plate
to avoid the possibility of overflow.
4) Start the brew cycle:
a. Turn the switch to On. Then, press the
brew button to begin the brew cycle.
b. When the water has flowed into the
decanter, turn the coffeemaker Off
and let the water stand for 30 minutes.
c. Repeat Steps 1 – 4b.
it sounds like a restriction in the perk tubes have you cleaned I mean deep clean the unit??? It should be as any auto coffe maker should be clean deeply every three to six Months depending on how much you use it. How you do this is take 1/2 viniger in pot and fill to capacity.. Dump this into the unit and brew it through. Then ite recommended to rinse them by brewing three to 4 times with clkean water. now if this dosent work its probably behound feasability to repair