Boiler connection 22mm

[centralheatking]

This is my 3rd winter in the house and the heating has never been good. If I set the thermostat to 23 degrees the boiler never turns off. I have had the heating on 24 hrs a day since November to keep moderate heat in the house. Viewed the house in August and moved in in December. My plumber has calculated that the 16 yer old boiler has more than enough btu to adequately supply the rads. My theory is the 15mm pipe work long runs are not efficient. I may have to consider a 22mm re-plumb of the heating.

So at 23 deg the boiler unit never modulates what we mean is that the pump might run but the burner set will ignite and close down, your unit just carry’s on. I asked you to tell us from cold when starting your bolier how long it takes for the return pipe to get hot and your boiler to modulate
I am going to leave this open to the others as you seem incapable of providing answers to simple questions all we want to do is help .....centralheatking

 

[Roger of Weston]

Centralheatking
wow you’re rude.
It might surprise you to know that not everyone has central heating knowledge or an understanding of the terminology. I know you are here to help for which I am most appreciative. I most likely haven’t answered the simple questions because I don’t know the answers. If you would be so kind as to put your questions in a list form I will do my best to answer, as long as they are simple questions.

 

[ShaunCorbs]

Yes the rads get hot top to bottom.

sounds like it’s not a boiler issue or pipe work more likely the rads arnt sized correctly for the rooms

 

[Roger of Weston]

I don’t think it is a rad size issue as the rads don’t get hot, only warm. The house is quite warm as we keep the heating on 24 hrs.

 

[Stu-B]

I don’t think it is a rad size issue as the rads don’t get hot, only warm. The house is quite warm as we keep the heating on 24 hrs.

You’re best sticking to one story here to get the best advice 😂
In one post you say rads get hot all over, and in another you say they don’t get hot only warm.
No wonder chKING got a little annoyed 😂😂

time to start again methinks.
How did your plumber calculate the heat output of the 16yo boiler? Did he look at the data badge or run the boiler and gas rate it? Maybe you have a pump running a little weak if it’s the same age as the boiler.
Tbh issues can be hard to diagnose without being stood in front of the boiler, a good gas engineer can tell you a lot by running the boiler, listening to what noises are being made whilst feeling the pipework.
good luck pal 👍🏻

 

[Chuck]

I don’t think it is a rad size issue as the rads don’t get hot, only warm. The house is quite warm as we keep the heating on 24 hrs.

A numbered list of questions for you, as requested:

Qn 1. How much gas the boiler is using when it is on with the thermostat up to 23 degrees? (Take two gas meter readings an hour apart and report the values here.)

Qn2. What is the Central Heating Water target temperature set by the controls on the boiler?

Q3. What is the Central Heating Water flow temperature being reported on the boiler display?

Q4. Is the 'heating demand' light (it's blue on a Worcester Bosch boiler, which is what I think you must have) on continuously?

Q5. Can you hear the boiler shutting down after running for a few minutes, then waiting a while and then firing up again in a cycle while the blue demand light remains lit?

 

[king of pipes]

A 16 year old combi boiler is old its quite possible the pump is getting weak and its performance is dropping off you have a heating engineer get him to gas rate the boiler on high rate see how much heat its delivering a few pictures of the boiler may also help. Kop

 

[Last Plumber]

An experienced Heating Engineer should easily be able to come to a conclusion with this based on his/her knowledge.

If the rads are not getting warm enough, the cause could be a multitude of things.

I don't think you'll get the answers to your problem on a forum because the people you are talking to have not seen or tested your installation and there are too many possibilities with this kind of fault.

It could be a boiler issue - one of many - or indeed an installation problem. whether that be undersized pipework, partial blockages or other restrictions, short circuiting etc. it really needs an accurate diagnosis.

I think the best thing is to find a highly recommended Engineer and trust their conclusions or suggestions based on the results of their investigations.

Flow and return temperatures are always a good place to start with these things in my opinion, as they will give a good indication of where to start looking.

I hope this helps.