I own a Gaggia Classic for 3 years, and today it started to always heat up the water to steaming temperature, regardless of setting to brew or steam mode. As if I had replaced the brew thermostat to a steaming thermostat.
Anyone faced a similar problem?
Should the brew thermostat replacement solve this issue?
Basically the steam switch provides a bypass of the brew stat so that the brew stat can't cut off at its temperature. If you are getting too hot with the brew stat, steam switch off, then likely the brew stat is bad. That assumes that the steam switch is working and not staying on. The steam switch also control the 3 way so that with the steam switch on, the group is bypassed for water output. If you open the steam valve and hit the brew switch, water will go out the wand and not the group if the steam switch is working normally and then if you continue to run "brew" and turn off the steam switch, water will exit the group and wand, and you can close the steam valve and shut off the wand.
Is there a light that goes on and off to let you know when the element is on? Does it go off at brewing temp despite the machine still heating? What I'm getting at is it could be a cracked/shorted element. Do you have a multimeter?
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