vaillant boiler fault

Glad you’re sorted! Is this a digital pressure display rather than a good old fashion analogue gauge with a needle? I’m guessing strain gauge based pressure sensors are becoming the norm now. My daughter can tell me her system pressure from her phone. I still have to go look in the garage. ;-)

I’ve always found Vaillant very helpful.

Tim

Perhaps, but it's not so impressive when you find out that fault has been around for 18 years (

Pinto economics obviously.

Sounds like a good result :-)

FYI there is usually a small traditional pressure gauge inside the boiler that will work regardless of what the electronics is doing... usually down beside the pump:

Yes, when the guy took the front off he immediately said, Look, yer gauge is showing very low pressure when yer electronic display is [wrongly] showing 3 bar.

Re the design of the sensor; the guy described it as a diaphragm mounted in a flow tube close to an iron magnet; the water pressure presumably distorts the diaphragm which affects the magnetic field. The failure mode is (he thought) that the iron rusts and sheds particles that then clog the flow tube. Or something like that.

I know, but it's a pain to keep doing it, I've got to take the clothes-drying racks to bits first.

If its common, perhaps they actually do not keep a record of who has them, but do keep a stock as they had a faulty batch. I remember back when I was a youf, A certain washing machine was always getting stuck closed, and when the bloke got there he said it was a known fault with a certain batch of switches that got stuck. Well one might have thought a recall might have been nice? Brian

Which one? Google throws up lots of economists called Pinto.

I expect it's the amazing exploding Ford Pinto.