As this is a Heat eXchanger machine, you don't have a thermostat, you have a pressurestat.
What is the machine doing?
Is it not getting hot at all?
Is it not stopping the heater and goes into a runaway heating situation?
More info from you is need to even establish a place to start!
PS, you have a high temp safety switch on that machine, it is possible that it has tripped for some reason, this would turn the heater off and prevent it from turning back on. It should have a red reset button in the center of the device. If you push it, it will click back on.
Then you need to find out why it tripped in the first place.
In real life, my name is Wayne P. Anything I post is personal opinion and is only worth as much as anyone else's personal opinion. YMMV!
Feed the newbs, starve the trolls and above all enjoy what you drink!
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