Hey Alex, Welcome to HB! Have you verified there is still power on the outlet? If it's plugged into a GFCI/RCD, it is possible the outlet tripped and it simply needs to be reset. Do you have any indicators on the machine at all? Standby should be a slow blinking red light. If the outlet is good and ...

Yes. This is all true for the steam boiler. In the case of the heat exchanger in the steam boiler, there is no steam within. Since the heat exchanger circuit is totally flooded with water, as soon as the water begins expanding, the pressure skyrockets. The steam boiler pressure corresponds to a spec...

I'm not sure I follow your question. The Gagguino project is an open-source PID controller with oodles of extras, using the Arduino framework. Feed-forward control of the heating element, pressure control via phase modulation of the vibe pump, fancy displays and controls, etc... also, Gaggia classic...

You've got it right. The preheat element is a heat exchanger tube. It's worth ordering an additional gasket and soaking the element in citric acid if it has a thick layer of scale on the steam side (or inside), but generally there will be no benefit to replacing it if it isn't somehow broken. I can ...

Water expands when you heat it. If the water has no place to go, the pressure rises until something relieves that pressure

Discussion around "Brew by Weight via Home Assistant" split off to its own thread to keep it from getting buried in here

Dosing by burr rotations also takes ramp up/ramp down out of the equation. I can't see how time-based would be better than burr rotations, since burr movement is directionally proportional to output. Time has inherent non-linearity built in, which is fine once you've set a dose, but if the start/sto...

Hey Fran, Welcome to HB! Can you describe how you are measuring the water temperature? 80C is a typical measurement to get from a properly functioning machine if you are trying to measure the drops falling from the group or the temperature of water collected in a cup. A good way to get a more accura...

Are you sure about that? Looking closely at the plumbing, it looks to me like you have a line pressure inlet fitting at the front of the drip tray surround that feeds a manifold that wraps around the back side of the frame to feed the groups and the valve with a lever on it. Given the other valve

I fill my machines with a 20 Oz steaming pitcher. Seems easy enough to fill pitcher and pour into boiler without too much trouble