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1,291 Central Heating questions

What is the best combi boiler overall for value and reliability?

Update - Thankyou all very much for taking the time to post your honest opinions - I'll be checking out your recommendations.
Most appreciated, Shona

Looking to replace my dad's boiler. Only had one quote so far which is based on a Ferroli boiler however when i research them online they are universally panned by almost everyone - clients and installers although I guess they are a source of work for the installers!! Fairly highly recommended seems to be Vaillent Ecotek but I think this is at the higher cost end of the scale.
Is there a boiler that has good reliability at a reasonable price or is it better to go with a big name like Vaillent or Worcester and pay more initially? My dad has a servicing contract with Scottish Gas so maintenance isn't an issue but all the same he doesn't want to be calling them out every 5 mins to repair it.
When I get quotes I want to make sure I'm comparing like with like and not getting a cheaper quote because it's based on a rubbish boiler.
Boiler is for a 3 bed house with one bathroom.

Boiler losing pressure but no leaks from Rads and no drips from pressure release outlet?

We have recently renovated our house and had a new boiler/central heating system installed and the boiler is always losing pressure. Once the boiler has been pressurised to around 1.5 bar it will run perfectly fine while it's on but once the thermostat switches it off it will lose pressure. We have had the boiler checked and there is no water in the boiler that shouldn't be there and no leaks from the pressure release outlet. This happens quite regularly and the boiler will often show 0 bar until re-pressurised!

I have checked all the rad valves and any pipe work I can see and there are no apparent leaks. There are no pipes under the ground floor and no leak patches on any ceilings. Any help would be much appreciated.

Air lock on system?

I have an old header tank system. I have moved a radiator, now the heating and hot water will not come on?

Do I have an air lock? and if so how do I solve this?

Cold water supply into the system?

my pressure on boiler MAIN combi 24he is too low ,how i can add water,whitch tap is for this

Hi. A new vaillant ecotec plus combi boiler was installed in my 3 bed house after having issues with my condensing boiler and tank.

The combi boiler was fine for a week. Then the radiators downstairs especially sitting room was very low on heat meaning heat is good when the heating is ON for 10 minutes ,then gradually goes down. I called the plumber who installed the boiler and he balanced all the radiators. But still heat wasn't proper to all the rooms.He took the pressure out of the radiators,power flushed too when he initially installed the system. The problem now is that the pressure gauge in the boiler often goes below 0 sometimes to red and heat in radiators comes down. I took the pressure out of the system by adjusting the valve in the boiler and it was fine for a day. Every day now the pressure goes to red or below 0. Also in the bedroom upsatirs where the pipes were taken below the carpet, there is a tapping noise and boiler vibrating sound whenever the boiler starts and also gurggling sound when water starts to flow.When I call the plumber, he isn't responding.I have spent thousands of pounds under the belief that heating issues will be resolved with this installation but all in vain. Why is there heat in raidiators when it is ON for 10 minutes and then heat gradually goes down in the sitting room radiatior?I am also worried about this noise upstairs. Can someone help and try to suggest something to resolve this issue?

Thanks
Sindy

New Build...Bath hot water tap is only lukewarm, rest if the taps are red hot!

I have just moved into a new build and the bath tap only every gets Luke warm and not hot enough to have a bath. All the other hot taps in the house produce extremely hot water but not the bath tap. I have tried turning down the flow and no matter what the flow, temperature still remains low. I have resorted to filling the bath with a pan from the sink as the tap in the sink is red hot!

The boiler is new and is a Worcester 34cdi green star classic combi boiler and is situated right next to the bathroom if this helps.

Worcester Greenstar Junior 28I vs Vaillant ecoTEC Pro 28 Combi

Which boiler is suitable for a 3 bed semi with 1 bathroom?

Worcester Greenstar Junior 28I or Vaillant ecoTEC Pro 28 Combi????

Can I refuse to pay a worker who did not fix the problem?

Hello,

Our boiler recently broke down and we called a plumber to fix it. He decided that a part needed replacing and said he'd come back. We paid him for the labour, even though we still had no heating. When he came with the part the following day, the boiler was still not working and the guy said the part was faulty. He returned the faulty part to the shop and charged us in advance for a new, functioning part. He came back with a new part the day after, but the boiler still wasn't working. The guy then decided that the boiler needed replacing altogether, as clearly that particular part was not the problem. We hired him to replace the boiler and paid all installation costs, but we asked for our money back for the part (a very pricey one). He refused to give us the money back and he refused to give us the part, even though we had paid for it and had an invoice for it. He says that if he gives us the part he will have to charge us labour for the two occasions when he came with the part. I think that's unfair, as he did not fix the problem, and we actually paid him lots of money for replacing the boiler. I think it's not fair that we paid for a service we did not get. The workman will surely sell the part to another client, thus charging two people for the same thing.

I haven't paid the full cost of the boiler yet, so can I just refuse to pay the full amount, recovering my money for the part that was not used?

Thanks a lot.

Should I replace microbore pipes?

Just moved house. There are microbore pipes to the radiators. I want to replace the boiler with a combi boiler, as there are just the two of us and heating a tank of water twice a day is a waste. I'd also like to install under floor heating in the kitchen, bathroom and en suite. The microbore is working well at the moment and we're in a very soft water area, but it's been suggested to me that microbore is unreliable in the long term. Should I replace it all while doing this other work? Thanks for any advice.

Vaillant boiler firing up when heating is off

I've moved into a new flat that has a vaillant boiler. I set the wall controls so that the heating would only come on if it was below 22 degrees (which it hasn't been yet) but noticed that the boiler is constantly making a noise. It got so annoying that I decided to turn the wall thermostat controls to 'off' but it still does it. I assumed that it must be to do with the hot water instead of the heating however then noticed in the manual that I can actually change the boiler itself to 'heating off' so tried this and it now doesn't fire up, unless I'm running hot water...which is I assume what it should be doing.

Why does it constantly fire up when the heating setting is on even if the actual heating hasn't come on? At some point I'm going to need it but the constant on/off rumble noise is so annoying

Any help would be appreciated

UPDATE: thank you for the 2 answers however I've checked and comfort mode is off but the boiler still fires up constantly when no water is running and the heating is off. The only way to stop it is to turn the actual boiler to 'heating off'.

Thanks

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