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What I meant with "mechanic" is the analog gauge at the front of the boiler. But I guess this is no different from the other readings - all readings are probably coming from the same sensor! So I think you are telling me that the pressure reader is failing. Which would make sense as there is no...

I have a vrc 470f, so reading from there as well as the manual gauge at the front. When it fails the pressure shows 0.8 or lower on the remote and at the lowest end at the mechanical gauge at the front. Both jump back to normal when I top up a little. Normal seems to be 1.5/1.6 going to 1.9 when...

Hi, I am out of ideas what may be wrong with our system. Some background: We had some pressure loss, 0.1 bar per day, on our Vaillant ecotec plus Boiler. No obvious signs of leakage across the house, no building work, radiator valves not leaking. Heating engineer diagnosed the expansion vessel...