My bunn model b10-b is leaking at the bottom out onto my counter top. so when i add 10 cups of water, I get about 8 cups. It appears to be leaking from the holding tank. The code date is 202103. Is there a fix for this?

probably a broken hose

You can only use bunn coffee filters or your water and coffee grounds will overflow.

If you haven't used a replacement carafe, then it is probably a clog in the drip orifice, at the bottom of the basket. Note: don't put hot water in your coffee maker as it will perk faster and cause an overflow. Only use cold water. If you have replaced the carafe then it is probably the wrong size.

Please call customer service with the model and date code from the bottom of your unit. The number is 800-352-2866.

If you will call Customer Service at 800-352-2866 with the model and date code we can further assist you.

These models have a plastic pour-in tray just under the top lid. The plastic on these trays gets brittle over time with the heating and cooling, and they crack where they mount to the tank. The only real way to repair this is to replace the pour-in tray, but these are not sold anywhere that I have found. You might be able to find a used one at a Bunn dealer in your area.
I have seen some people do a temporary repair by putting a washer under the mounting bolt and sealing it with silicone, but this is a temp. fix at best. By the way, the reason that the water appears to be coming from the bottom of the machine is that there is no other place for the water to come out after it leaks from the top.

take the top off there is a little oring where it takes water replace oring hardware store
had the same promlem

I have the same problem and I took the coffee maker apart to find out why. It has to do with a leak on a fitting. On mine I found that the fitting where the hole in the black plastic that the water flows through to get into the stainless steel tank needed to be repaired with some silicone sealant to fix the leak. Still making some coffee!

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!

there is an overfill tube in the rear that may be leaking.