Not making a full pot - Bunn CDBCF 15 APS Coffee Maker

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 (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.
* Make sure the decanters are all the same size. do not mix a 12 cup pot with a 10 cup pot. One will over fill and the other will under fill. Make sure they match (in cup volume) FYI; Thermo Air pump pots are usually bigger than one pot. Typical filling only to 3/4th of the container. (I think most are in 2.5 to 3 liter sizes)
* If your not getting a full pot then the brewer was partially empty. The second brew (if done within the next hour) should come out full.
* If your still not getting a full pot then the water is leaking or is boiling off. Does it always steam from the top? Thermostat is shorted. Unplug the brewer and call vendor for service.
* Final; If your unplugging when not in use. Then 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

You need to clean the coffee maker.Use white vinegar.Just fill the reservoir with and hit brew.When it is done.Fill the pot half way with ice and one hand full if salt.Swirl the pot till all stains are gone.Then run one full pot of clean water,to rinse.Make yourself a fresh pot and enjoy.

use more coffee the only reason it does not want to make a full pot is incase it over flowes and scaled someone

Check the thermostat on the machine, make sure pot is full before brewing. The water in the tank just heats up it is loosing most of it, make sure lid is on pour in screen.

Measure the amount of water in the decanter your using.Find another coffee pot to use.Make sure to use your de-liming spring.

The tank inside holds about 2 and a hlalf pots of water. Once the tank is full, whatever you pour in will come out. The unit has to be plugged in to make coffee. Leave a pot under the brew funnel and pour a pot of water in. If nothing comes out within a minute, pour another pot of water in. Still if nothing comes out do it again. This time for sure water will come out. It will take avout 10 minutes to get hot enough the first time it is full to make coffee. If you have a thermometer, the water should be about 190 degrees F to make coffee correctly.

Try cleaning out the water system, it may need to be descaled, buy the descaler from the supermarket, follow instructions, make sure machine is well flushed out with clean water after cleaning operation.

Is this problem happening by chance after you have used the maker? If so the heat from the previous use may be causing the water to steam from being so hot and thus causing the pot to be only half full. the hotter the maker the more water evaporates. You might need to let it cool down in between pots.

Joe

Remove the brew basket and water defuser (sprinkler head) it should come off with a 1\2 turn.
Place your measuring pitcher or empty pot in place.
Turn the main power switch off in back of unit.
Press and hold the Brew(full pot) button.
While holding the Brew(full pot) button turn the main power button in back to on.
Once the red light flashes over the Brew(full pot) button release it, then press it once to start the brew cycle.
Let it flow until desired level in pot or measuring pitcher.
Press the Brew(full pot) button once to Stop.
Press the Brew(full pot) button once again to lock the settings into memory. Memory will store the settings even if machine is unplugged.
Half pot button is automatically set.

Run 2 cups distilled white vinegar and 2 cups water through the system - brew it like it was regular coffee. Then run plain water through the coffemaker to rinse the vinegar out and make sure the decalcification was successful. Repeat as needed. Don't forget to remove the charcoal water filters first.

-Tha Mp3 Doctor