The steam boiler on the Elektra Verve dual boiler espresso machine is controlled by a pressurstat as shown in the picture below. Currently, it is a MATER pressurstat, but it can be a different brand. With the machine powered off and unplugged from the electrical outlet, remove the top panel by removing 4 allen key screws – one on each corner.
The boiler pressure can be increased or decreased with 1/4 turn increments.
The boiler pressure should be checked on the front gauge after each 1/4 turn. On the pressurstat, it has minus and plus symbols. Turn the center screw gently in the clockwise direction for the plus symbol, and this increases the steam pressure. Turning the center screw in the counter clockwise direction will decrease the pressure.
If you have never adjusted this screw and pressure escapes via the safety valve, the pressurstat may be damaged by limescale and should be replaced after a full complete descaling has taken place. The reason is that adjusting the screw for lower pressure usually does not resolve the overheating issue.
Make sure to not get over 1.9 bar as the safety valve for the steam boiler will open and sound like locomotive to release the pressure. In addition, one can turn the screw too much which would damage the pressurstat and also void the warranty.
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