My 10 cup Bunn coffee maker leaks from the top of the water resevoir, from the right top side and from the back top. It looses aprox. 2 cups of water onto my counter while brewing. What has happened to it??

probably a broken hose

Take top off by unpluging machine then removing the 2 screws where you add water.
Pry lid off ( where you pour water with a knife)
Remove 4 screws that hold top on.
Check this tank for leaks at sink.
inspect rest of plumbing and look at the brass pipe that goes into the tank and has 2 wires into it. The gasket / and washer here might be eroded or damaged.
possible to fix if you get the right parts.

if you unscrew the top there's a rubber seal in there that you might have to replace that causes the leaks. also clean your coffee maker regularly with vinegar.
my husband had to replace the seal in ours 4 times but after owning the same Bunn for 20 yrs it was time for a new one

look for water leaks around pot. Otherwise do a daytime brew to compare your difference between the amount poured in and what comes out. Please note that less water should mean using less ground coffee. Suggest 1 heaping table spoon per brewed cup.

It sounds like a seal/gasket is defective causing it to leak. Please locate the model and date code on the bottom of the brewer and contact customer service for troubleshooting and replacement options.

there's probably a 'silicon rubber' hose that feeds hot water to the 'grounds basket'- it may be loose, or damaged. is it leaking water, or coffee?? we have a bunn 8-cup, which has a pre-heated water tank that brews a pot in about 3 min. energy waster, but when you need coffee, you need coffee!!! is your filter holder properly centered? is the carafe lid hole clean and un-obstructed?
if it's leaking water, and not too costly to replace- you may consider replacing it with a new one!
good luck!

You can download a use and care manual:
http://bunn.com/pdfs/retail/usecare/38863.0000_BX_GR_UC_English.pdf

www.kaldi.com

Call bunn for replacement gasket free of charge per recall.

Well they don;t give these away for sure. Lets see if we can help you out. ? are you over filling it.This happened to me because I was reading the fill line wrong. {got new glasses} . If not may be you could try makeing less. But if only 1/2 cup comes out and no more, that wouldent indacate a leak in the tank, if there was it would all leak. Try backing off on the coffie and water, and see if it still leaks. if it does get back to me. DFD