The power light just keeps blinking and the unit heats up but I can't brew a cup.

The problem is in the exit tube. Clean the top tube with a paperclip end and free it from deposits that collected inside. Keep Filer up to date 3 months or less to keep particles from entering the heating chamber. Use Distilled water for less particle builup.

The cups only brew one mug at a time. Open and close the lid to check if that resets itself.
Otherwise, turn the machine off and on again to "reset" the function. Also check that there is enough water

Plugged upper tube to heat section. Clean Pg. 19 Manual

I had this problem too.
I just pressed the small brew button; it pulled some water from the reservoir and heated it but nothing came out. Then I opened and closed the top cop thing and both the cup sizes were flashing and it worked like normal again.

Open the brew mechanism. Opening the brew
mechanism will initiate the heating of the water and the
HEATING light will flash.
2 Place a clean cup on the cup stand, adjusting the height of the
stand up or down so that the rim of the cup is close to the
brew mechanism.
• To adjust the cup stand, insert your finger in the center
of the stand, lift and turn.
• To avoid spilling over, please choose the right sized cup for
the drink you are making.
3 Position your choice of T-DISC on the T-DISC holder, label facing
down. Firmly close the brew mechanism by pressing the clamp
down until it shuts. The HEATING light may flash again as the
machine heats the water to the required temperature for
your drink.
4 When the AUTO light illuminates, press and release the start/stop
button. Brewing will start automatically. There may be a short pause
during brewing; this is normal and is designed to draw out the full flavor
of your drink. The AUTO light flashes throughout the brew cycle. When
the machine has finished brewing, the indicator light will move from
AUTO to MANUAL and then, after a delay of 30 seconds, to HEATING.
5 Open the brew mechanism, remove the T-DISC and discard.
Your drink is now ready to be enjoyed.
You can prepare the next beverage right away by repeating
steps 2 - 5.

• All lights will blink the first time you turn on your
machine. This is your cue to prepare your machine for use by
following the quick instructions in Step 1 on separate insert.
• If the water level runs low while you are preparing a
beverage, all lights will flash. Simply remove and refill the
water container, and brewing will continue automatically
where it left off. It should not be necessary to discard the T-DISC
and start over.
• The AUTO light will blink throughout the brewing process.
Some drinks require a pause in brewing as part of the recipe
for brewing your perfect cup - this is to allow the optimal flavors
to unfold and is a normal part of the brewing process. The AUTO
light will continue to blink throughout this process.

HOW TO MAKE A DRINK
• Place the mug of your choice on the cup stand.
• When the STANDBY light illuminates, insert the T-DISC® of your choice
and close the clamp.
• The HEATING light will blink as the brewer heats the water to the
optimal temperature for your drink.
• Once the proper temperature is reached, the AUTO light will
illuminate. When it lights up, press the start/stop button to begin
the brew cycle.
• The AUTO light will continue to flash throughout the brewing cycle.
PLEASE NOTE: Some beverages have a pause in brewing
after the initial influx of water into the T-DISC®.
• The MANUAL light will illuminate when your drink is ready.

VPS/VPR are pour over brewers. Like the 12 cup brewers you find at home, they need to be filled with 12 cups of water (a full pot), heated and then peculated over the coffee grounds and collected in a decanter.
BUT there is one main difference! The VPR and similar COMMERCIAL coffee machines are quick brewers. They usually have a pre-heated pot of water stored inside the machine.
* VPR's and similar machines REQUIRE a pre-fill and heating period prior to brewing. This means it's sitting on a level table and filled with water until water sprays from the brew head. At this point the unit is plugged in and the heater is turned on (CWTF's have a toggle switch behind the machine). Brewer will pre-heat the water (there may be some water discharge from brew head as the water expands). Ready light will come on in about 15 mins.
* To Brew; Place coffee grounds in filter, place in funnel and brew head, clean empty decanter under funnel, slowly pour one full decanter of water (cold or hot) into brew tray. Do not overflow tray. Allow water level to sink before adding more water. Only fill with one pot as an equal amount will come out the brew head and funnel.
* FYI Coffee grounds are usually in pre-measured packets for office use. A simple guide is one tablespoon per cup. (level or heaping spoon is up to you)
* Final; Getting back to unplugging when not in use. Yes there is a heater in the machine that keeps the tank warm. You can save power by turning off the warmer plates when not in use. Some units have up to 6 plates. The warmer "Blanket" is designed to keep the tank warm enough to brew and not waste heat or electricity. Yes unplug the unit at night if there is no night crew drinking coffee (or tea) But follow the Pre-heat instructions mentioned above prior to plugging the brewer back in. If the tank has been emptied at night or dried up after an idle week. Then there is a chance you may over heat and blow the thermal fuse. Or at best have a half pot short brew as the water dried up.
* Note leaving the brewer plugged in without brewing daily is not a good idea. The water evaporates and eventually drys out the pot. Takes about 1-2 weeks but it does blow the fuse(s) and the unit will need service.
* Final; Follow the Bunn set up and care instructions (manuals from Bunn.com for down loading. (*FREE*)
Aloha, ukeboy57

all the lights are blinking its clean, descaled, filled with water and the power button and all the buttons just blink and it wont brew just had this machine less than 6 months and the machine will only quit blinking when i unplug it and yes ive tried different outlets when i plug it back in all the lights start blinking again and it wont brew i want a solution to this problem and i dont want to be sent to another site where they charge me to answer a question the $119 i payed for the thing should be enough im ready to throw it out the window im so frustrated with it

Lift the handle to open the k-cup holder and then close it back up. The coffee mug lights should begin to blink for you.

Try descaling the machine. If there is no water getting to the brew unit then it might be blocked, if you checked the brew unit then the blockage might be at the boiler or one of the lines.