Combi boilers?

[Mr Bump]

one thing i noticed when we got our vailant installed is it has a mode that keeps the hot water heat exchanger up to heat aqua comfort or something and that does mean the water is hot very quickly but it means the boiler cycles about every 10 minutes , i turned ours off as we generally only draw hot water for showers and the odd washing up bowl.

 

[mex]

Getting a Vaillant in stock might be a job in itself, same with Worcs, Baxi and now Ideal boilers. There is a problem with component (pump) supply chain.

 

[Bobsyeruncle]

Getting a Vaillant in stock might be a job in itself, same with Worcs, Baxi and now Ideal boilers. There is a problem with component (pump) supply chain.

The supply issue was caused by a microchip shortage cause by covid and a fire at the main chip factory in China.
Worcester have now built their own chip factory in Germany so most models are readily available...

 

[mex]

The supply issue was caused by a microchip shortage cause by covid and a fire at the main chip factory in China.
Worcester have now built their own chip factory in Germany so most models are readily available...

Good luck getting one, hens teeth right now.

 

[mj4456]

Daughters combi has thrown a strop, wouldn't fire up due to low water pressure, sorted that but domestic hot water side no worky, central heating ok but that's not needed at the moment, awaiting neighbour who's a heating engineer popping in to check it out.

 

[Bobsyeruncle]

Daughters combi has thrown a strop, wouldn't fire up due to low water pressure, sorted that but domestic hot water side no worky, central heating ok but that's not needed at the moment, awaiting neighbour who's a heating engineer popping in to check it out.

Sounds like a faulty/stuck diverter valve...

 

[gman]

We've had our Worcester Bosch Greenstar 37cdi for over 11 years now and it's never failed. We get the boiler and magnaclean filter serviced every year.

 

[boogie man]

We've had our Worcester Bosch Greenstar 37cdi for over 11 years now and it's never failed. We get the boiler and magnaclean filter serviced every year.

Magnacleans are great, definitely worth having one put in if there isn’t one fitted already. The amount of magnetite and sludge that came out of our system after the first few weeks of installing it was unreal. It’s got cleaner every time since of course. They’re actually very easy to service yourself, just isolate via the two red valves, unscrew the lid, clean out any crud, reassemble and turn the valves back to normal. I do ours every year, only takes 10 -15 minutes or so.

 

[mj4456]

Sounds like a faulty/stuck diverter valve...

If I could get the boiler cover off I’d have a look and give anything looking like a valve a wee knock.

 

[bass_junkie83]

If I could get the boiler cover off I’d have a look and give anything looking like a valve a wee knock.

They normally have a couple of valves underneath or somewhere easily accessible, just open them both up until the pressure is op to around 1 bar and shut them off again.

This is mine which I just did, normally need to do it around once a year.

 

[gman]

Magnacleans are great, definitely worth having one put in if there isn’t one fitted already. The amount of magnetite and sludge that came out of our system after the first few weeks of installing it was unreal. It’s got cleaner every time since of course. They’re actually very easy to service yourself, just isolate via the two red valves, unscrew the lid, clean out any crud, reassemble and turn the valves back to normal. I do ours every year, only takes 10 -15 minutes or so.

For the extended warranty we had to use a Worcester Bosch approved engineer to service it and he cleaned the filter as part of it, but now that the ten years are past I may now look at doing the filter myself in between services, just to make sure it's being done! Thanks for the tips.

 

[boogie man]

For the extended warranty we had to use a Worcester Bosch approved engineer to service it and he cleaned the filter as part of it, but now that the ten years are past I may now look at doing the filter myself in between services, just to make sure it's being done! Thanks for the tips.

Ah fair enough if you were getting it included in the boiler service. There’s plenty of YouTube clips to help out, but it’s very easy to do yourself .

 

[boogie man]

They normally have a couple of valves underneath or somewhere easily accessible, just open them both up until the pressure is op to around 1 bar and shut them off again.

This is mine which I just did, normally need to do it around once a year.

View attachment 354324

Those are the filling loop valves… you use those to get the system pressure right. They’re nothing to do with the diverter valve.

 

[Neilc28]

Nope, new builds are still having conventional/combination boilers fitted

Ground-source where possible/viable, otherwise conventional gas boiler are what we work to in our Housing Association.

Supposedly the introduction of a hydrogen/natural mix (HyBlend?) could delay the 2025 target date for some builds where heat-pumps are not viable.

Another happy Worcester Bosch customer here in any case, got a Greenstar 30Si, had a 2 small issues over the 7 years… condensation trap getting blocked which was an easy fix once you know what you’re looking for, and an exchanger plate which needed to be replaced (WB direct service within 24hrs).