Leaking of water from below reservoir when brewing, especially when pump is on.

#1. Use the paper clip trick on both top and bottom punchers. The holes are in the side of the punchers. (lots of video in youtube) #2. Descale it again with vinegar and leave it for 15-24 hrs before brew rinsing, (instead of 4 hours as mentioned on the manual) #3 some said, turning it upside down and giving it a shake, #4. visibly check the screen on the the water reservoir tank entrance clean if there's any visible clog. #5 Still having a problem, then, for the last resort, before deciding on replacing the diaphragm pump, open the bottom metal part (5 screws), inspect for any visible drip of water (accumulation of white hard water stains, or discoloration on the metal) visualize where it's coming from. Mine is on 2 areas--from the diaphragm pump (where there's 3 black screws) and where the connection of the main pump to the reservoir. This is good news, it means nothing wrong with the pumps. it's just been leaking a little bit of water on the connection (must be air tight, any leak will decrease the pressure). The common sense FIX: depress the metal clamp and pull the plastic tube out, clean the inside and the connection and re-attach it back making sure the little leak will stop. same with the other one then, then replace the other smaller tube with a new tie wrap and make sure it's air tight. Basically you just check all the hose connections make sure it's air tight..

When everything else that you tried fails... like descaling with vinegar and leave it for 15-24 hrs 2-3x before brew rinsing), or the paper clip on both top and bottom punchers cleaning, or turning it upside down and giving it a shake, or cleaning the water reservoir entrance. then, for the last resort, before deciding on replacing the diaphragm pump... open the bottom metal part, inspect for any visible drip of water (accumulation of white hard water stains, or discoloration on the metal) visualize where it's coming from. Mine is on 2 spots, from the diaphragm pump (where there's 3 black screws) and where the connection of the main pump to the reservoir. This good news, it means nothing wrong with the pumps. it's been leaking water so the connection is the only problem (must be air tight). The common sense FIX: depress the metal clamp and pull the plastic tube out, clean the inside and the connection and re-attach it back making sure the little leak will stop. Replace the other one with a new tie wrap and make sure it's air tight.

If it is in warranty, this unit needs factory services. Unfortunately the cheap labor and rapid production rates are more important to the company than Quality.

Descale the boiler with citric acid.

1. Turn off the machine and let it get cool
2. Dissolve about a tablespoon of citric acid in the water reservoir.
3. Turn on the machine and then pump about a cup of solution out of the boiler vent using the hot water switch.
4. Turn off the switch. Close the vent
5. Let the boiler heat up for about 5 minutes.
6. Shut off the machine. Let the acid work for about 30 minutes.
7. Check the level in the reservoir.
8. Turn on the machine and then pump about a cup of solution out of the grouphead using the brew switch.
9. Turn off the brew switch.
10. Repeat steps 5,6, 7, 8, and 9 until the water runs clear.
11. Wash out the reservoir.
12. Turn the machine on. Pump a full reservoir water out the grouphead using the brew switch.
13. Refill the reservoir.
14. Have some coffee

System over flow. Seals may be hard form age. Do not go over MAX line with water.

there is a small rubber flap valve in the tank. if you carefully clean that on a regular basis your problem should end.

Hi,
Below are solutions for a leaking coffee maker and how to decalcify the machine?
Tools and Materials needed to fix this problem are as:
* White Vinegar * Fresh Water * Volt-ohm Meter * Screwdriver
Step 1 - Clean
If your coffee maker seems to be clogged, try cleaning it with a mixture of white vinegar and water. Assuming that your coffee maker has a 12 cup capacity you will want to use 11 cups of vinegar and 1 cup of water. Fill the coffee pot to the 11 cup mark with vinegar and then fill it to the 12 cup mark with water.
Pour this mixture into the reservoir and turn on the coffee maker, allowing it to run through a brewing cycle as if you were making a pot of coffee. By doing this you will dissolve any build up in your coffee maker. If the coffee maker is leaking because the pump is clogged, then this might clear the clog and stop the leaking. If it has been a while since you last cleaned your coffee maker, you may need to run the vinegar through more than one cleaning cycle to dissolve all of the buildup.
Step 2 - Pump Valve
Unplug the coffee maker and examine the pump valve. If the pump valve is broken or has a clog, then the water will not be able to rise up and flow through the fill tube. When the coffee maker is turned on, the water needs to go someplace. If it cannot flow through the fill tube, then it may leak onto the countertop. If the pump in your coffee maker is sealed, you will need to replace the whole pump. If the pump is not sealed you should check it to ensure it is not clogged with coffee grounds or mineral deposits.
Step 3 - Brew Switch
Examine the brewing switch to ensure that is working. To get to the brewing switch, remove the base plate. Next, you will need to test the switch with your volt-ohm meter. Touch the tester to the RX1 scale. If it reads 0 ohms then you will know that the switch works fine. If it gives you a number other than 0 then it is time to replace the switch.
Step 4 - Tube Connectors
If the coffee maker is leaking or sputtering then you should take a look at the tube connectors. Many times, a leaky coffee maker is caused by faulty tube connectors. If you find the leak is in an elbow, clean the surfaces before you replace it. If the tube connector leaks, replace both the tube and the elbow so that you can be sure the pieces will both fit together properly.
To decalcify, you will be needing a : decalcifying cleaner and A container large enough to hold the same quantity of liquid as your water reservoir
1) Remove the machine's water reservoir. 2) Empty all liquid from the reservoir. 3) Fill the reservoir with warm water. 4) Add one packet of the recommended cleaner to the full reservoir and stir until the cleaner is dissolved. 5) Return the water reservoir to the machine. 6) Turn the machine on. 7) Set the large container underneath the steam wand. 8) Set up your machine so that hot water -NOT steam-will be emitted from the steam wand when the steam valve is opened. 9) Open the steam valve according to the manufacturer's instructions. 10) After all of the decalcifying solution has drained into the large container (within a few minutes this will occur), remove it and discard the liquid that has been collected. 11) Rinse the water reservoir thoroughly and then fill it with the type of water you usually use for brewing. 12) Return the water reservoir to its normal position. 13) Using only water repeat steps 7 through 9 until the water reservoir is empty again.
I hope the above helps....
Good luck.

Suspect the 'pump' tube that runs from the reservoir bottom up to the grounds basket. It may be cracked or the end clamp on the tube is weak, broken, or misplaced on the tube. Check the reservoir for a cracked base or fitting. Remove the bottom plate to get to this. (unplug the cord).

The water reservoir on this mdoel is very close to the coffee reservoir - if excess water gets between the wall of the coffeemaker and the coffee reservoir, it will leak exactly as you described. Make sure no water spills out of the water reservoir when your pour it.

-Tha Mp3 doctor

Probably tye pump. If it was the hot water reservoiur it would leak without brewing.