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Make sure the coffee maker is full of water. Keep filling it till water comes out of spray head.. Should take two full pots plus 3/4 of another one. Wait for water to stop coming out of spray head. Now the unit should be ready to brew after it heats up.
There is NOT an adjustment for the pour over coffee brewers. I think you have calcium build up. Remove the spray head and use the spring to clear the water tube (from tank to spray head) if you are handy, remove the top cover and use the spring to clear the hole were the water goes down to the tank from the reservoir.
If there is a lot of calcium build up you need to descale the brewer with vinegar. Pour 64oz. of water only, When brewing coffee.
Spring is provided from BUNN when you bought the brewer, if not you can order one.
NOTE: Make sure you unplug the brewer before removing the top cover.
Your spray head has 5 to 6 little holes depending on the model and year, and it looks like you have scale, calcium or lime blocking them. Since your model is a VPR pour model, you will have less trouble cleaning it with white vinegar than the permanent water connection type. I use a gallon of vinegar and filters for this.
Parts needed: 2 Clean, Rinsed Empty coffee cans 1 Gallon of White vinegar 5 coffee filters 1 Toothbrush, preferrably angled head
Start with your Bunn turned off and place an empty full size coffee can under the pour spout. Now place a filter in the brew basket to catch any fine particles you don't want poured back in the resevoir and heater. You will need to change this filter a few times as the trash starts coming out of your spout.
With the coffee can, brew basket, and a fresh empty filter in place you want to start pouring the vinegar in the tank while catching the water with the coffee can. As it fills with water you will need to dump the can down the drain until the full gallon of vinegar has been poured in the Bunn. Allow the excess water to finish flowing out into the coffee can making sure to leave half the water in the can to pour back into the coffee maker.
By now your tank should be filled with mostly white vinegar, and your coffee can should be at least half full of vinegar as well. Now you can turn on the lower pot warmer to keep the solution hot and plug your Bunn into the outlet.
Allow 8 to 10 minutes for the heater to heat up and pour the half full coffee can of vinegar into the fill area. Allow the cycle to complete and replace the filter as needed, or if flow begins to slow down. If your heads are clogged, use the toothbrush to clear the holes as the vinegar is flowing until you see all holes flowing vinegar.
Chunks of trash will dislodge in your heater tank and flow to your spray head, so keep that toothbrush ready.
Do this at least 5 times, then allow the Coffee maker to sit 30 minutes with the heater on to finish dissolving the lime and calcium deposits in the tank.
After 30 minutes start flushing the system with clean water to rinse out all of the vinegar, or until you can no longer smell vinegar in the coffee can.
Hello this coffee maker has a one and a half gallon internal tank, could be one of a few problems, first thing to check is the spray head, unscrew this you may need some channel locks to get it off and check it..use a tooth pick to clear the 6 holes with any lime that may have formed...also if you use a commercial coffee company for your coffee they should have supplied you with a spring to clean the spray head tube.
After checking these 2 items the next thing to check is there enough water in the tank..when the vpr is left on and not used for a few days the water in the tank evaporates..it takes approx two and a half pots of water to fill up the internal tank...try pouring another pot of water in...also turn machine off and take the 2 screws out of the top and see if there is lime blocking the drain hole in the fill pan.
Hope this helps...please feel free to comment again if you have any other questions...Good Luck!!! Mike