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error code e02 wont work when pressurised?

Ariston Microgenus 28 - when pressure is 0 it works, when pressurised wont work! Have changed flow switch and pressure gauge - no luck
Alex Davies, October 2019
It sounds like a wiring fault or loose connection somewhere. This would be a job for an Ariston engineer in the interests of safety, rather than keep changing parts in the hope that you can fix this without proper

Rupert, October 2019
link Click here to see other fixes for Ariston.