Appia s or appia v? if appia v, you have problem with main board. if it is appia s, then you have problem with power supply
SOURCE: nuova simonelli appia 1 ....pump will not stop pumping so tank fu
Your level probe is on the right hand side plate of the boiler, normally with a red wire leading to it.
I would take the probe out (spanner reqd, obv. with no pressure in the boiler) and clean it with wire wool.Scale often causes the probes to malfunction.
Then make sure when you refit the probe, the part of the probe in the boiler faces down.
SOURCE: Describe your Nuova Simonelli Mac 2000 I Group
Either the brew solenoid is bad or the shower screen is blocked or the metering jet on the top of the head is clogged.
SOURCE: My Nuova Simonelli Mac digit pushes steam out of the group
The metering jet on the top of the boiler is blocked.
SOURCE: nuova simonelli vip over pressure problem
Could be lack of water in the boiler, could be a faulty pressure stat or vent valve. Check the level probe first, then the vent valve and then the pressure stat. You can also use the manual fill to make sure water is getting to the boiler.
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