Door from grinder will not let coffee into brew unit
From the description I understand that the flap at the outlet from grinder is not easy to open and let coffee grounds out from the grind chamber.
Firstly this is a mechanical obstruction and not related to any electrical or electronic control.
This happens frequently in the Ceramic burr grinders due to the following reasons:
1- The beans used are dark roast oily. Such beans are not good for use i any fully automatic model. This should be stopped immediately.
2- The grind fineness may be set at fine powdery level. This is done because there is wrong assumption thata fine grind makes stronger espresso. That is not applicable in fully automatic machines. The extraction of espresso in fully automatic machine is with pre infusion (also called pre brew soaking) and uses a back pressure valve for 9 bar extraction pressure. For this reason
the coffee grounds should not be finer than table salt grain. If coffee fineness is set at powdery fine, then the setting should be changed to coarser setting.
3- Grinder may not have been cleaned for an extended period. If so clean the grinder. Use brush or scrape solid deposits in corners and crevices to clean.
Finally as a part of cleaning, use a rag wrapped on finger or screw driver to wipe the invisible oil deposits on the grinder parts between the burr and the outlet.
Check the flap in the coffee outlet is hinged correctly and moves freely front and back to make sure that it is not blocking outlet for ground coffee.
Jun 25, 2015 |
Gaggia Titanium Espresso Machine