iFixit

We will now focus on opening the heart of the Barista: the boiler.

Remove the four hex bolts securing the brew head to the boiler assembly.

Lift the brew head off the boiler.

Remove the single Phillips screw securing the perforated plate and gasket to the boiler housing.

• The perforated plate evenly spreads out the steam/boiling water to evenly brew the ground coffee held in the basket.

Use a a large standard screwdriver (we used a washer and a pair of pliers) to remove the one-way valve spring retainer from the bottom of the boiler.

• The one-way valve spring is tuned to only allow the valve to open when the pressure reaches a certain level, coordinating to the perfect temperature for brewing espresso.

Use a flat blade screwdriver to separate the two halves of the boiler. Inside the boiler, you can see the main components:

• Boiler housing (to contain water and steam).
• Heater coil.
• Dual thermal sensors, presumably one to maintain steam temperature and one for max temperature shut down.

The bottom portion of the boiler housing has a rigid hose reaching toward the top of the boiler to collect steam for brewing the coffee.

There are also two Klixon thermal sensors. The numbers stamped around their bases are:

• 1NT01L-0036 L95-10 9910 M 10/250~T200
• 1NT01L-0499 L127-15 9912 M 10/250~T200