On 16/05/2021 15:14, Andy Burns wrote:
Theo wrote:

I don't know if you can actually get the parts these days, or whether
they're sufficiently pattern that you can find or fashion suitable
replacements.

I've had to replace the thermocouple, obviously they're generic sostill
available, I think I have a spare somewhere, It has no electronics, if
the coil on the gas valve goes that might be curtains for it?

Because old boiler are regularly decommissioned, I've never had an issue
with finding parts on eBay.

I'm guessing you don't have the gravity hot water as described, though?

I do.

It
sounds like that was a good reason to fit zone valves and controls on the
hot water, even if you kept the boiler.

it's sleeping dogs now ...

Maybe, but converting the rest of the system to take a heat only boiler
would make the fitting of a new boiler simpler.

I don't think a registered gas installer is allowed to replace a boiler
without bringing heating controls up to date at the same time.