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Sorry, only just saw this. You are correct, storage heaters would be required as my electric is virtually free only while the sun is out. All my lights are led to compensate for having to pay to turn them on. I just wish the technology for harvesting rain energy was cheaper and easier to...

Is it actually a hot and a cold feed to the valve or has it just been repurposed?

Maybe the system has been altered in the past and it was just left in, perhaps the boiler was just overpowered when new. I believe underfloor heating can utilise lower temp heating. I don't know anything about really old boilers, did they maybe not have internal stats and just keep belting out...

I would leave that be. It's a four way valve, I can't see how it's set, but they're designed to lower the temperature by mixing hot and cold together. Unless it's actually doing that, in which case I'd be thinking about changing the setting.

I wonder if the heat exchanger has come away from the pipes???

You'd be lucky, at best keep an eye out for a decommissioned unit with intact exchanger. I've looked at mine and I doubt it would be too difficult for someone in the know to copy, they're not exactly special. A coil of pipe shaped to fit the boiler, with an alloy box to retain the heat and of...

Take your radiators off one at a time and flush, shake, flush until you can't get any more crud out, flush the system after that leaving all the newly flushed radiators switched off to increase flow through the pipes. Be kind to your boiler though, if you blow the heat exchanger it will be game...

This is actually the only acceptable route for me, I have a full bank of solar panels (16 in total) they really do make a difference, I installed back in 2011 so I get maximum return on the investment, but my inverter packed in two years ago and was I surprised when the electric bill arrived...

Have you checked the pump efficiency yet? I swapped my pump as I bought a new one for £30, it changed my heating as previously cold radiators now get hot, the old one was still spinning up, just not working properly.

I'm quite proud of my old boiler and will do as much as I can to keep it going (I'm a believer in bangernomics), it's a very early copper exchanger model. I used to work in a national callcentre that covered utility insurance and the horror stories associated with modern equipment put me off for...

I'd be interested to know the actual figures in relation to expenditure for modernising, presuming their condemned boiler was very old. My point being, sometimes the outlay takes decades to recoup in fuel savings. Double glazing isn't always the investment people think and loft insulation can...

I do indeed, except in the warmer months following a high wind. I only use my boiler for heating, not for hot water. Standing charges mean I pay the same for a pilot light as I do for zero usage.

Gone for the majority, but not everyone. My ideal elan, works just fine and I have no intention of scrapping it.

I'm not sure having the moneysworth out of an older boiler is relevant, it's more of a problem with modern tat that often becomes obsolete the second the warranty is up. Older boilers aren't plagued with the many issues their modern counterparts suffer from and if you factor in the cost of...

As in moving water, maybe the impellor fins have disintegrated

Have you checked the water pump is working?

Older boilers have very little in the way of electronics, however, they do usually have two internal thermostats a high and a low. Perhaps one of those is in need of replacing. If so, you'll have to hunt online for them as older boiler spares are rarely found in part shops. My boiler is 30+...

That's currently static charging, mobile charging will take over. You'll never need to exit your vehicle to recharge. It'll be a major selling point in colder and wetter climates. Although it will likely encourage excessive extra journeys too. Think teenagers with access to parent's credit...

Two...Three... Four... OK, FIVE thoughts (speculation) on the matter... 1. Eventual charging on the fly via wireless charging. Something between scalextric and a modern mobile phone. I think we're stuck thinking like fossil fuel users, for something that is entirely different. New roads will...

These folk might be worth contacting, past experience has shown me that electrical engineers often just enjoy the chance to stretch their memories. https://www.remco.co.uk/contact