Pressurstat Adjustment/Removal – Elektra Microcasa Leva

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The Elektra pressurstat (pressure switch) controls the steam pressure which is proportional to the temperature of the boiler. Very rarely, the little switch on the side of the pressurstat fails and the unit does not heat at all. The best way to check with this failure is with a continuity tester or multi-meter.

The more common problem is the Elektra Microcasa a leva espresso machine overheating. This is caused by water damage – either purified water that oxidizes the inside the pressurstat or limescale (magnesium or calcium) that damages the inside of the pressurstat. In most cases, this scenario causes the elasticity of the diaphragm inside the pressurstat to harden and now allow the switch to be depressed to turn off the power to the heating element.

These two water scenarios do not allow the switch behind the diaphragm to turn off the power to the heating element. In both of these scenarios, the unit should be descaled first, rinsed, then have a new pressurstat installed. If only an adjustment is made or if there is no descaling before replacement, the overheating problem can occur within 10 days – the reason is the limescale can damage the new pressurstat rather quickly.

The third cause of failure is the age of the pressurstat. The diaphragm may not be elastic enough to press the switch to turn the power off to the heating element.

Pressurstat Removal

  1. Unplug the machine.
  2. Remove the screw under the drip tray.
  3. Lay the machine on its side.
  4. Peel the bottom cover. You will see a cylinder with a screw in the middle of one end and a tube on the other end. There will also be 2 wires attached on its side. Around the screw, you will see a small imprint of a line with two arrows. On the arrow, you will see a small “+” or “-” sign.
  5. You can disconnect the nut on the copper tube from the pressurstat. The wrenches should be 11/16.” The nut on the pressurstat side may need to be a slim version.

Pressurstat Adjustment

  1. Unplug the machine.
  2. Remove the screw under the drip tray.
  3. Lay the machine on its side.
  4. Peel the bottom cover. You will see a cylinder with a screw in the middle of one end and a tube on the other end. There will also be 2 wires attached on its side. Around the screw, you will see a small imprint of a line with two arrows. On the arrows, you will see a small “+” or “-” sign.
  5. Turn the screw a 1/2 turn toward the minus sign to lower the pressure.

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