Replacing the Nespresso CitiZ pressure relief valve

Introduction

If the pressure relief valve no longer works or it is leaking, it must be replaced. This is shown here.

Tool used on this step:

iFixit Precision 4 mm Screwdriver Bit

$2.99

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The bottom is secured by oval head screws.
These screws have an oval head that makes them look like rivets (picture 2). You need to use a special bit - also available at iFixit - for their removal. Here a DIY guide. If the right bit is not available, it could be done with a pair of needle nose pliers. Nespresso wants to keep us out of our own machines!!!
Remove five oval head screws securing the large bottom panel.
Note: this panel is smaller on models without milk frother.

The bottom panel is just snapped into place. Insert a metal spudger into the slots and lift the panel out. It sits quite tightly and you might use some force to get it out.

Disconnect the two spade plugs on the blue and brown wires from the power switch. The two left ones remain.

Remove four oval head screws from the small bottom panel.
Remove the main device from the base. It´s still connected with some wires, but this doesn´t bother much.

The two colored side panels are only snapped into place. However, the latches sit very tight. You really need a lot of force. First lift the lower edge using a plastic opening tool.
Depending from the model it might help, when you first pry off the coffee spout. (See next step)
Unfold each of the side panels upwards and remove them.

Insert a opening tool in the gap on the bottom of the coffee spout. Pry it off carefully.

In the first picture, the pressure relief valve is marked in yellow. It is located at the bottom of the machine. It is connected directly to the heater.
The spare part is ready for installation.

First remove the two connections on the clamps. Each connection is sealed with an O-ring. Those usually get stuck in the pressure relief valve. Replace those with new ones when reassembling.
Carefully remove the valve.
A hose attaches to the underside of the valve. This hose needs to be pulled off as well.
The valve is now detached.