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I have come across a couple of random fault codes with our Vaillant boiler in the 10 years we have had ours . I would not worry about them if a reset solves them unless it happens more than once or twice.

I only concern myself with 2 and then ensuring the heat curve of the boiler is appropriate for our house.

A skill worth learning. Paying an engineer to do it doesn’t make sense to me given the time it takes.

Agreed

But won’t do anything to deal with the residue in the pipe work.

It’s a case of finding the right installer/engineer and ideally a personal recommendation. One tip is to find a highly recommended one that is too busy and as them to recommend a local smaller company that is more likely to be available.

My guess is faulty circuit board.

We like the design and performance of the Geberit wall hung.

The U.S.A pans are very different to ours with a comparatively large pool of shallow water.

I’d get a second quote on the repair.

Cumulative effects (Lehman, Brexit, Panedmic, Truss etc), short memories and general misunderstanding that a quick fix doesn’t work for many things. Our predecessors understood this better than us but as we have become more reliant on technology (which isn’t itself a bad thing, we are just not...

I would fully close all lock shields apart from the troublesome radiator. When it is up to temperature, move to the the next downstairs radiator and open the LS just enough to heat up. Repeat for the other downstairs rads. Check the troublesome one is working ok. Then move upstairs and repeat...

People want instant answers and a quick fix. There isn’t one - it’s going to be a hard slog.

I was told that the issue has been exacerbated this year by the dry summer/autumn.

A 20W router on a 700VA UPS should last 3 or more hours.

Assuming it’s a combi, what is the pressure in the radiator system? F22 is a low pressure code. If you’ve bled any radiators (often the highest one) without topping up the pressure may have dropped enough to cause the issue. I had this happen a couple of times and the pressure was ok and I put...

I’d use a vpn server (Wireguard is excellent) on a compatible router or a Raspberry Pi.

Fine until the warranty ran out and because of numerous issues they gave me an extra year. Numerous pressure sensors, diverter valves and a new heat exchanger. System was flushed and inhibitor present but made no difference. Been running for 12 months with no issues so keeping fingers crossed...

Won’t have another Vaillant after lots of issues with our ten year old Ecotec but they appear to have resolved those in recent models. Round here installers like Baxi.

Most TVRs stick in the off position in my experience.