Post By cleanCup
Post By Caffeinator
Post By MorganGT
One group producing a darker crema than the other ?
I have a two group machine , my RH group produces a slightly darker crema than the LH,
Same baskets,coffee etc,
Could it be a HX problem ?,
It's not uncommon for there to be some temperature variation between groups in some multi group machines. Assuming all else (including dose) is identical, it's likely something you may need to learn to manage. Alternately a good tech might be able to solve it. It's pretty easy to do in an e-61. Other machines may require different solutions. Some- not possible to tweak.
Originally Posted by cleanCup
I would think it would be caused by differing temp/flow (assuming all else being equal), depending on the design could be a bit of scale or similar in one of the group flow paths/thromosyphon paths?
I've seen differing pours and temperatures on different groups on a HX machine in several situations - a couple due to scale buildup affecting thermosyphoning in the heat exchangers (fixed with a descale of the heat exchangers), one due to an injector tube feeding a heat exchanger breaking off inside the heat exchanger (fixed by replacing broken part), and one where mismatched restrictors had been fitted to the pipes from the heat exchangers to the heads (fixed by redrilling the smaller restrictors to match the biggest one).