Question about Keurig B100 Coffee Maker

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Using Burnzy's solution for little/no water

It was great having the picture of the side. But before I disconnect the check valve, I want to make sure I have it properly identified. Is the check valve the clear white assembly that is located below the bent tube out of the tank unit and above the bent tube going into the white/silver cylinder ?
Do I let the pump run the full "cup" cycle before turning it off, to get all the water out of it or just a few seconds?

Being a semi-fixit girl, I just like to make sure BEFORE I dismantle the wrong part. Sorry guys for a probably a "stupid" question.

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My picture had arrows with labels indicating the location of the pump and the check valve, but they disappeared when I posted it. Anyway, It sounds like you have located the check valve that causes most of the brewing problems. The valve is white and semi-transparent with a spring in the middle. When this valve fails, water flows from the tanks and down into the air pump (white/silver cylinder) which disables the pump.

I have repaired three of these now, and two needed new check valves, but only one just needed to be cleaned. I found the valves on ebay for $7.00 (try seller; "Dartbikes"). if you do need to replace the valve, make sure that you purchase a high heat (275+ deg F)rated 1/4" to 1/4" check valve. The new valve will not be identical to the original, so will be adding the valve under the original. This should fix your problem... however, one of the units I fixed had a frozen pump which was caused by the water that got into it. I was able to open the pump and free the frozen parts with silicone, then it worked fine again.

As for your second question, no you don't need to run a cycle or drain it before opening the unit. However, you should unplug the machine to prevent getting shocked. Though, you may need to power in on a few times while it's open to test it. So if you do, don't touch any terminals or exposed wires.

Good luck and let me know if you still have questions, Erik

Posted on Feb 23, 2008

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KeuSymptom: keurig B100 coffee maker not brewing. If your brewer sounds like it should be brewing but little or no coffee comes out, the problem may be a simple malfunctioning check valve, located on the right hand side of the unit under the plastic cover. If the check valve is clogged or fails, water from the tank leaks into the air pump (located just below the valve) disabling the pump.

The pump that pushes the water out of the tank located on the right hand side of the unit (I included a photo) has a check valve just above it. On my unit the check valve failed allowing water to enter the top chamber of the pump disabling it. The pump was not damaged it just cannot operate correctly with water in it.

Here is the Fix: Disconnect the check valve and make sure it is operating correctly. Mine was clogged with a small amount of mineral deposits, which was cured by a half hour in a glass of vinegar, and a good rinse. Then disconnect the tubing from the top of the pump and run the unit to allowing the water to escape the pump. Make sure there is no water left in any of the tubing between the pump and the check valve, even the smallest amount will disable the pump again. Reconnect everything and it should work.



Good luck and if you find this helpful remember to thump up vote itc3bb7bf.jpg

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Symptom: keurig B100 coffee maker not brewing. If your brewer sounds like it should be brewing but little or no coffee comes out, the problem may be a simple malfunctioning check valve, located on the right hand side of the unit under the plastic cover. If the check valve is clogged or fails, water from the tank leaks into the air pump (located just below the valve) disabling the pump. This happened to my brewer two days ago. I have had this unit for about four years and never had a problem. When I called tech support at Keurig they said "it sounds like the pump is shot", but there was nothing they could do and they would not repair it. Instead of the throwing out my $300 coffee maker I figured I would try to fix it myself. After 3 hours of tinkering, I found and fixed the problem, so I am passing on the tip. Since 2.5 of those hours were spent diagnosing the problem, the fix itself is pretty simple. The pump that pushes the water out of the tank located on the right hand side of the unit (I included a photo) has a check valve just above it. On my unit the check valve failed allowing water to enter the top chamber of the pump disabling it. The pump was not damaged it just cannot operate correctly with water in it. Here is the Fix: Disconnect the check valve and make sure it is operating correctly. Mine was clogged with a small amount of mineral deposits, which was cured by a half hour in a glass of vinegar, and a good rinse. Then disconnect the tubing from the top of the pump and run the unit to allowing the water to escape the pump. Make sure there is no water left in any of the tubing between the pump and the check valve, even the smallest amount will disable the pump again. Reconnect everything and it should work. Hope this was helpful. Erik

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Hello,
If your brewer sounds like it should be brewing but little or no coffee comes out, the problem may be a simple malfunctioning check valve, located on the right hand side of the unit under the plastic cover. If the check valve is clogged or fails, water from the tank leaks into the air pump (located just below the valve) disabling the pump.
This happened to my brewer two days ago. I have had this unit for about four years and never had a problem. When I called tech support at Keurig they said "it sounds like the pump is shot", but there was nothing they could do and they would not repair it. Instead of the throwing out my $300 coffee maker I figured I would try to fix it myself.
After 3 hours of tinkering, I found and fixed the problem, so I am passing on the tip. Since 2.5 of those hours were spent diagnosing the problem, the fix itself is pretty simple.
The pump that pushes the water out of the tank located on the right hand side of the unit (I included a photo) has a check valve just above it. On my unit the check valve failed allowing water to enter the top chamber of the pump disabling it. The pump was not damaged it just cannot operate correctly with water in it.
Here is the Fix: Disconnect the check valve and make sure it is operating correctly. Mine was clogged with a small amount of mineral deposits, which was cured by a half hour in a glass of vinegar, and a good rinse. Then disconnect the tubing from the top of the pump and run the unit to allowing the water to escape the pump. Make sure there is no water left in any of the tubing between the pump and the check valve, even the smallest amount will disable the pump again. Reconnect everything and it should work.
I hope the above helps.
Regards.

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Hello,
If your brewer sounds like it should be brewing but little or no coffee comes out, the problem may be a simple malfunctioning check valve, located on the right hand side of the unit under the plastic cover. If the check valve is clogged or fails, water from the tank leaks into the air pump (located just below the valve) disabling the pump.
This happened to my brewer two days ago. I have had this unit for about four years and never had a problem. When I called tech support at Keurig they said "it sounds like the pump is shot", but there was nothing they could do and they would not repair it. Instead of the throwing out my $300 coffee maker I figured I would try to fix it myself.
After 3 hours of tinkering, I found and fixed the problem, so I am passing on the tip. Since 2.5 of those hours were spent diagnosing the problem, the fix itself is pretty simple.
The pump that pushes the water out of the tank located on the right hand side of the unit (I included a photo) has a check valve just above it. On my unit the check valve failed allowing water to enter the top chamber of the pump disabling it. The pump was not damaged it just cannot operate correctly with water in it.
Here is the Fix: Disconnect the check valve and make sure it is operating correctly. Mine was clogged with a small amount of mineral deposits, which was cured by a half hour in a glass of vinegar, and a good rinse. Then disconnect the tubing from the top of the pump and run the unit to allowing the water to escape the pump. Make sure there is no water left in any of the tubing between the pump and the check valve, even the smallest amount will disable the pump again. Reconnect everything and it should work.
I hope the above helps.
Regards.

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So to test it, disconnect the hose and run a cycle to listen and feel for air coming from the pump. If it is not working (frozen due to the water permitted to enter from the failed check valve), you must remove it to dismantle the top part of the pump.

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