Question for the techies...
Does the performance of a pressure-stat change as it ages? Will it respond more slowly or less accurately than a new one? What is the amount of variation in boiler pressure (between element cycles) that you'd expect to see in a non-PID'd, old-style hx machine?
I ask because I've noticed that the pressure in our machine (9 year old Astoria Argenta) varies between about .95 bar and 1.2 bar and I'm not sure if that is ok.
The espresso is ok, but I think it would be better at a higher temperature. Not sure how much effort to put into dialing in the pressure if we need a new pressure-stat first.
Any thoughts?
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