Air pump failure …
This issue comes from our reader George. George’s Keurig would heat the water, but when it came to pumping it out into the K-Cup, the brewer stopped. George had tried a vinegar rinse cycle, but of course, this didn’t prove easy with it not releasing water from the boiler unit. So what is going on with this coffee maker?
In this type of Keurig problem, the brewer’s water pump appears to be working just fine as it can take water from the water reservoir and pump it into the boiler unit. You can hear this pump working a short while after the machine has been switched on. What is generally at fault is the air pump (as pictured below).
The purpose of this pump is to force water from the boiler unit into the entry needle top assembly and then through the entry needle into the K-Cup portion, which of course, then delivers the coffee to your cup. The air pump achieves this by forcing air into the boiler unit, forcing the hot water out under pressure. Now, of course, if the air pump is faulty in any way, this pressure change doesn’t take place, and so the water isn’t forced out – or not enough of it.
The problem with the air pump often arises from rust or limescale buildup inside its casing. This contamination can occur from solenoid leakage, with the pump picking up some of this moisture. The solenoids leak from their sealed housing ends or the connection points into the brewer’s tubing system.
Solution 1 – The Keurig Burp
The easiest solution to this problem is not very elegant and doesn’t always work for some readers. We call it the Keurig Burp. We have written a short guide for this procedure, and you can find that by following the link – or by using the menu on the right-hand side under Keurig Repair Guides and scrolling down towards the bottom of the page.
Solution 2 – Replacing the Air Pump
However, this is the more permanent, more difficult fix where we will need to replace the air pump. This does take some work and time, but you can do it. With a new air pump, you will overcome the lack of air pressure to move the water from the boiler. However, this repair does require taking the outer casing off the brewer and replacing the pump with a new one.
If you would like some guidance on this process, you may wish to watch our two-part video series on removing the outer casing from a Keurig. And once you have that done, you may like to look at our easy-to-follow guide on replacing the air pump. The pump you need is on our spare parts page.
If you have any problems with the process, you can always get in touch through the comments section below.