Lime has built up I usually use vinegar to clean out coffee makers, but worry about getting all of the vinegar out of the bunn pour-o-matic because of that reservoir of hot water.
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Clean a Bunn coffee maker once every three months if you have hard water. ... Unplug the Bunn coffee maker from its power source. Verify the brew funnel is in place in the machine, and set the decanter in the unit as if you were going to make coffee. Add 1 quart of white distilled vinegar to the top of the brewer.
The white film is just mineral (lime) build up, but indicates the whole machine may also have buildup. You can try brewing some plain water with a cup of vinegar added, or get one of the commercial coffee maker cleaning products sold at supermarkets.
The film at the very top, visible in the grate, isn't likely to be affected by either cleaning method because the water just passes right through it. For that part, try some full strength vinegar on a cleaning cloth.
To clean the vpr you will need to take the lid off the machine. Be sure to unplug while doing this. First clean the water tray. You can unscrew the nut holding this tray and clean the tray in your sink. Put the tray back in and put the lid back on. Plug coffee maker in. Fill one coffee pot with vinegar and pour it in machine. After the water finishes coming out let the coffee maker sit overnight. Before you start filling the maker with water at least 6 times, be sure to clean the spray head. Make sure the 5 or 6 holes are free and clear of any build up. Then start with fresh water. Fill the coffee pot with fresh clean water and pour into machine. Let it finish and do this at least 6 times. If you can still taste or smell the vinegar repeat until you cant.
This is a clogging issue. Meaning it needs to be cleaned. So what I want you to do, if first read this manual that I am sending you via a e-mail link. Just copy and paste link in browser; I am positive it is just clogged. In the manual it will show you some tips on how to unclog it with tooth pick etc... then you want to flush whole system with water and vinegar. Here is the link to put in browser. http://www.bunn.com/pdfs/commercial/manuals/10424.0000.pdf
First make sure you have enough water in the machine. It holds about 2 and a half pots of water in the holding tank. If the machine sits for a week without use but is still plugged in, sometimes the water will evaporate down to the point where pouring one pot of water in, will not fill the tank back up. If you still don't get a water flow, take the brew funnel out and reach up where the water normally comes out, There is a round water dispenser about 2 inches in diameter. Unscrew it by turning countercloclwise. It has a dozen or so holes where the water come out. Be sure these holes are not stopped up. There is a small pipe fitting where you took the water dispenser off. Bunn makes a long spring like thing that fits into this hole to remove built up lime deposits. If you don't have one you can use a flexable wire like braided copper wire about 18 inches long to push through the hole and slide it back and forth until it comes out clean. If you have hard water, like well water you may be getting a lot of calcium build up in the tank. Put about a quart of vinegar in the next coffee pot and let it sit an hour. Pour water through the machine until it stops smelling like vinegar. That should solve your problems.
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.
you can always clean a coffeemaker with vinegar, but always pour in cold, so you can do it twice or more, but dont re-use the stuff you just used, wait till it's cold or just use some other.after use clean by let water through 2 or 3 times, (also only cold water)
If the unit works okay, there is no damage. I would suggest using vinegar, or better to use a recommended cleaner from an appliance dealer, rather than something as strong as CLR.
After cleaning the coffeemaker with any type of cleaner make sure it is properly rinsed out!
Use the de-liming spring to clean the copper tube behind the spray head. Pour several pots of clear white vinegar through the unit to further remove lime and scale from the interior of your coffee maker. My Bunn is 24 years old, and the only replacement parts I've ever required are new carafes and the 4041 silicone washer repair kit.
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