My Bunn coffeemaker is leaking water after it stops brewing and the coffee doesn't seem to get as hot as it once did. It also only gives back 4 cups for a 6 cup brew.

Try really cleaning the basket that the water and coffee or cocao goes into. If you don't really clean it well, it will have the taste of the last thing brewed mixed in with the new brew. Coffee followed by coffee should not be a problem, but coffee followed by cocao will give the cocao a coffee taste, and visa versa.

Unplugged, check the wire connections, heating element and thermostats
You need to have a volt meter for this job.

Make sure all hinges & covers are correctly on!

Make a 1/2 pot 50/50 mixture of cold water and white vinegar then run it through the machine in normal brewing fashion. Place a clean filter in the brewing cup to catch the white deposits that are removed. Allow the mixture to cool, then repeat the process several times while using the same filter. Finally, run several pots of fresh water through to work out the taste of the vinegar. Repeat whenever the brewing time seems to be excessive.

What's happening is that it isn't leaking, it's boiling over. You need to turn down the thermostat under the top lid. Also, before you brew coffee, add water to the tank and let it pour into an empty pot. Once it stops brewing, let it heat up for a few minutes then make your pot of coffee.

The machine will allow you to brew from 4-10 cups. It works on a displacement systems so if you pour in 4 cups of water, then 4 cups of coffee should come out. If it isn't, then get the model and date code from the bottom of the unit and call customer service. If you machine is 3 years old and less, it will be replaced at no cost. If it is over 3 years old, it will be replaced at a reduced price.

The silicon seal inside the coffee maker tends to disintergrate. Bunn Inc. does not sell parts for the inside of the coffee makers, but a seal kit can be purchased through a small appliance repair center or repaired for a small cost. Kit is about $8.00 at most places.

It sounds like the tank isn't full. Unplug the machine and make sure there is a pot underneath to catch water. Pour clean water into the tank until it starts flowing out. Plug the machine in and let it heat up. Then try brewing coffee.

The way your machine works is that there is a holding tank for the water and it isn't actually brewing with the water you just poured in, it is using the holding tank water. If the holding tank gets low, and you pour water in all it does is fill the tank but nothing will come out.

Hope this helps.

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.