Intermittent F75 fault on a vaillant ecotec plus system boiler pressure is ok on the gauge

⚠️Vaillant ecotec plus intermittent F75 ⚠️ Customer called to say their boiler keeps intermittently flashing up F75, I asked them if their pressure was ok on the gauge and they said it’s at 1.3bar and they’ve never topped it up… On arrival the boiler didn’t flash up a fault, they said several engineers have also attended this but as no fault was present they explained there’s nothing they could do, which I completely agree with, however, after a little of experience with this boiler I know one of the common faults is the pressure sensor… I carry this as van stock and I can complete this within the first hour so I’ll get this swapped over to give them a warm and stress free Christmas 🎄