Leaking from bottom

Leaking water from bottom of unit during brewing:

• Verify that the water is leaking from the bottom of the coffee maker and not just running down the back during filling and pooling underneath. (Look under coffee maker - without lifting - to see if water droplets are hanging from bottom of unit)

Resolution:

If verified that water is leaking from bottom of coffee maker Contact Us for further assistance.

https://www.kitchenaid.com/service-and-support.html

So it sounds like you have either a split in the water reservoir or the tube connecting the reservoir to the heating elements has come off. Looking up parts I couldn't find a new reservoir available. I also don't know how hard it would be to get at the connecting tube and see if it came loose. There should be an access panel, either on the back of the unit or accessible by removing the dirt bin. Then I would pour some more water into it and see where the water is leaking out. If it is coming out the bottom where the steam is supposed to come out then I think the steam chamber has cracked from the heat of the elements. If this is the case, from the reviews I have read (you are not the first to have this issue) then the cost to fix it is going to be higher than getting a new one. I have noticed many many complaints that this item only seems to last for a 2 year period. I don't know how long you have owned the unit. If it is new you may be able to return it for a new unit.

The leak is most likely between the water reservoir and the tank. Bunn uses a soft silicone seal for that connection that gets compressed over time and starts to leak water whenever you make a pot of coffee.

It's planned obsolescence. Bunn won't sell you a new seal. So you have to improvise. But it's simple enough to do.

Remove the top cover and the plastic water reservoir right below it. Don't tamper with the little valve that opens when you close the lid.

Look for the seal. It could be stuck to the bottom of the reservoir, or sitting loosely on top of the metal tank. Make sure to preserve its top-to-bottom orientation (don't put it back in upside down).

Apply a narrow bead of clear silicone into the grooved side of the seal. Press the seal gently onto the reservoir, then apply a thin layer to the smooth side.

Re-install the reservoir and reassemble the unit.

The water leaking out from under the unit, indicates that the drain line to the water reservoir is clogged. Turn the unit OFF and unplug is from the outlet. Allow the unit to completely thaw, before attempting to service it. Once unplugged, you may want to put some towels under it, to absorb the water dripping,

Once the unit is completely thawed, remove the water bucket and empty it, if necessary. Look for a tube or hole near the top of the cavity, that the bucket sits in. Using an 18" to 20" long plastic Zip Tie (or something similar. NO wire cost hangers, though) that will fit into the tube or hole, carefully insert it and continue to push it in until you reach a bend in the tuber. This is the tricky part, as you need to gingerly work the Zip Tie past this bend. Once you do, continue to insert the Zip Tie, until it bottoms out or you have reached it's maximum length. Slowly remove the Zip Tie while rotating it. This will dislodge any clogs. Once you have almost removed the Zip Tie, be prepared for some water to follow.

Clean the filter and wipe down the entire unit. Plug it back in, turn the Master ON/OFF Switch to ON and set your controls as you normally do.

Hope this helped you to troubleshoot and solve the problem.

There is a red hose that connects at the back and top of the unit. Make sure the hose has not come undone and also check that the top lid with the holes is not blocked with coffee grounds. However, the most probable problems will be the hose otherwise you will mostly have steam coming out the back.

Hope this helps!

blow some air thru the discharge line,, thats all it is the line is clogged, if the pan is filling with water, it is working but they do get clogged with dust and lint in the air,,

There are a few hose connections inside the unit related to the heater element. Water flows from the reservoir down into the unit, takes a turn into a tube with the heater element wrapped around it, then turns back up into the mister area. Any of the four connections (base to first elbow, elbow to heater tube, heater tube to second elbow or second elbow to base) could be leaking.
The white ring around the mister disk cracked on my unit, letting water leak out the bottom as you describe... Take a close look at that.
It's also possible the base itself is cracked somewhere... Look closely at the mister and reservoir areas of the base for cracks.

It depends on where the leak is coming from. If the water pump is leaking, it has a hole on the bottom of it. You will see a trail of dried anti freeze coming from the bottom of it, indicating a bad water pump. It's best to dry everything off, crank it up and let it come to operating temp and check for where the leak is coming from. It may just be an old hose or loose clamp.

I had that problem last year. When I took it apart I found that the drainage hoses that lead to the reservoirs were plugged with dust build up. I clean out the hoses as well as the rest of the insides. I have since placed the entire unit inside a shallow (under bed) style rubermaid tote and have not had any more water leaking. Hope that helps you.