When water is poured in, only a small portion comes out into the pot. Is there some kind of screen or lter that gets clogged?

Some machines are set to release a small portion of water into the softner to cleanse it, however u may have a clogged hose line forcing water back up and out? or cracked damaged lines, etc even a house tube that came unplugged ?

Your pour over coffee brewer has a reservoir that holds more than a pot of water. First thing you need to do is turn off the machine. Then put the empty coffee pot on the burner. Then take another container and fill it with fresh cold water and pour it slowly into the coffee maker until it starts to come out into the coffee pot. Stop pouring in water.

Now turn the machine on and let it heat up. Now you can brew normally. The reservoir has to be filled before you turn it on or you will end up eventually burning up the heating element.

Most likely you have a clog in the filter container. Use a toothpick to clean the small spout at the bottom. Then hot soapy water. Hopes this helps.

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.

If you pour water into the machine, and water comes out, then the reservoir is full of water. There is no way the water can bypass the reservoir and go directly into the pot.

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.

Hi, Get 2 pots place one under the spray head with the filter cone in....now fill the other coffee pot and start to pour water through the lid top front...keep pouring water through (about two and a half pots) until water starts to pour through the cone....now the tank is full plug her in and turn on the power switch at the back and also the front if there is one....place filter in cone..put coffee in filter...pot on burner...wait about 25 minutes until water in tank is hot...when light on front comes on pour another pot of cold water through the top and you will get a pot of hot coffee in bottom....I also think this machine can be hard wired into water main....get plummer to hook up...follow same procedure but instead of pouring water through top for coffee..hit brew switch. if it poors too much of too little you will find a timer in the machine you can adjust to allow more or less water...hope this helps.

I had the same issue, poured in 8 and out came 6. Here's what I did to clean and fix.
1) Unplug the NHB
2) Remove accessories like the pot and basket
3) Bring NHB over to the sink
4) Snap off the entire top cover (not the swing lid) by starting at the front and lifting upward (the top cover is about 1/4" thick). The back of the top cover will pivot a bit and then pop off exposing the pour reservoir. Remove the flow stopper inside the pour reservoir by lifting it straight up.
5) Place the top cover and flow stopper aside.
6) Remove the brew diffuser (located underneath the top where the brew basket goes. Twist counterclockwise gently but forcefully enough to snap it past the lock tabs which hold it in place. You'll know that it you've done this correctly when it just falls out.
7) Still over the sink, tip the NHB in a fashion where the back side is facing upward and the brew side is facing down into the sink. You'll be holding the NHB horizontally by the top and bottom of the unit. This will allow any water in the tank to pour out the brew spout. Begin to tip the unit as if tipping upside down as this will allow any remaining water to drain out. If this does not work the brew spout hose may be clogged and you can just tip the unit entirely upside down to empty it from the fill hole in the pour reservoir.
8) Return the NHB to the upright position in the sink.
9) Using a scotch brite sponge and some baking soda, clean the inside of the pour reservoir and rinse.
10) Using the tool Bunn provided, clean out the brew spout hose which is located under the brew hat. This is the little hole where the water comes out. If you don't have the tool Bunn provided you could use something like a plastic tie-wrap. Don't use anything metal as the hose you're cleaning is made of plastic tube and could become punctured. Clean this hose for just a minute or two to ensure that there are no significant obstructions.
11) With the NHB upright in the sink, pour a slow stream of hot water from the faucet, about two cups, directly into the fill hole located in the pour reservoir.
12) Tip the unit horizontally, as in step 7, and place the tip of your finger over the pour reservoir fill hole covering it completely.
13) Shake the unit back and forth horizontally so the water in the tank splashes around and frees anything which may be built up in the tank. Some water may splash out of the brew spout hose.
14) Tip the unit as in step 7 to drain the tank water out.
15) Fill a 16 ounce glass with hot water and 2tbsp baking soda, mix and pour into the pour reservoir fill hole.
16) Repeat steps 13 and 14 once.
17) Repeat steps 11 through 14 three times.
18) Clean the pour reservoir cover, swing lid and flow stopper.
19) Put the flow stopper back in place.
20) Attach the top cover.
21) Clean the exterior of the NHB.
22) With the boil and warmer switches off, plug the NHB into the electrical outlet.
23) Turn the boil and warmer plate switches on.
24) Fill the NHB with one pot of cold water and close the swing lid. Wait one minute.
25) Fill the NHB with another pot of cold water. Place the pot on the warmer plate and close the swing lid. If water does not yet come out, fill with one more pot of water.
26) Allow water to drain from brew spout until it stops draining.
27) Empty pot.
28) Fill pot to 10 cup line and pour into the NHB. You should find that the NHB now delivers 10 cups back to the pot. Empty the pot.
29) Clean brew spout diffuser and replace back in the brew hat.
30) Clean the pot, pot lid and brew basket.
31) Wait ten minutes for the water in the tank to boil.
32) Brew your coffee as you normally would.

The only issue I experienced during this process was with the warmer plate switch. It appeared that the light in the switch blew although the warmer plate still warmed normally. Shortly after the water in the tank started boiling the warmer switch light started operating again.