Boiler vibrating since pressurising system

[Jay100]

Hi All

Was hoping someone may be able to help. Moved into a new house which already had a megaflo fitted. All was working well with the WB 30 boiler . Then decided to pressurise they system and add a new radiator. Engineer came and did all the work but ever since system was pressurised the boiler every now and then vibrates violently and only stops when I turn the heating and hot water off from timer. I switch it all back on straight after and all is good but then itll happen again a few hours later or the next day. I have recorded the vibrating sound incase that gives any clues.

Appreciate any help/info

cheers

jay

 

[johnf]

Hello Jay
I would get the engineer who did the work back to have a look. Without further information it is hard to say for sure but it could be air trapped in the boiler/system. Its hard to know for sure without being there.

 

[Jay100]

Thanks John. He has been out and opened the by pass valve a littlr more...was ok for a week and them started doing it again. It only started happening once system was pressurised and new radiator added...really odd. Ive recorded it so if theres a way I can send you the recording let me know...may give some further clues?

Thanks again pal
Jay

 

[ShaunCorbs]

He has fitted a red expansion vessel ??

 

[Scott_D]

It was an open vent system before?
Tanks in the loft?

 

[Last Plumber]

Is the filling loop passing ? Is there water discharging outside when the thing vibrates?

 

[Jay100]

Yep red expansion vessel fitted

 

[Jay100]

Yep it was an open vented system before with tank in loft.

 

[Jay100]

Not sure what you mean by passing but I can top the pressure up via the filling loop and I checked for water discharging outside...nothing.

 

[townfanjon]

What does the gauge on the bottom of the red heating vessel show when the heating is on, and what does it start off on when it is cold .

 

[Jay100]

When heating and hot water cycle is on it reads just under 3bar & last time I checked it was around 1.5bar when cold.

 

[Last Plumber]

If it's just under 3 bar the chances are your Pressure relief has opened. Quite often they chatter and bang as they are spring loaded.

You need and Engineer, Gas safe registered and G3 too !

 

[Jay100]

Would that cause a vibration/droning sound from the boiler?

 

[Last Plumber]

Would that cause a vibration/droning sound from the boiler?

I am having second thoughts now tbh.

When you say you've changed a rad, is the TRV on the right way ? I know they are bi directional but on occasion they will make a vibrating noise depending on system pressure ( flow) and that would ( or could ) stop if you turned the heating off. I don't know if anyone else agrees with this but we shall see in due course i am sure !

 

[Jay100]

Yep trv def on the right way. Before boiler started making this vibrating/droning sound I remember now the bathroom towel radiator rattling once quite loudly and then hallway radiator (closest to boiler) rattling and then nothing for a while. Then after all this boiler now vibrates only. Also just checked there are 2 expansion vessels. One is white which was the original one there with megaflo and the new one installed is a silver one. Attached a picture.

 

[Jay100]

https://m.youtube.com/watch?v=6DTPS7ebjVo The noise is similar to like the one in this video.

 

[ShaunCorbs]

thats an easy fix but requires the services of a gas safe engy

 

[Jay100]

Cheers for reply but any idea what the fix needed is and what kinda price im looking? Do you think faulty fan?

 

[ShaunCorbs]

Cheers for reply but any idea what the fix needed is and what kinda price im looking? Do you think faulty fan?

as i hope you will understand we cant give out whats wrong with a gas appliance as its an open forum and we dont know who will see this thread later on and might try and fix it them selves

same with prices, ask a few local recommanded gas safe engys if you dont know any your more than welcome to post the job up on the forum

[DLMURL="http://www.ukplumbersforums.co.uk/im-looking-plumber-gas-engineer/"]I'm looking for a Plumber or Gas Engineer[/DLMURL]

 

[Jay100]

Appreciated.

Thanks

Jay

 

[Jay100]

Hi All

Dont know if this is connected but the cylinder thermostat which is a esi electronic dual thermostat continously has the red led light on which says it is calling for boiler to heat the water and this is even when both CH and HW is switched off from timer?

Any ideas....

 

[Riley]

As said before get a gas Safe engineer who is also G3 qualified, to diy either appliance is illegal

 

[Dotty]

Good advice above.

Thread closed.