Noisy radiators when heating comes on

[Jayt08]

Hi there
I live in a flat with a communal heating system. I've never had a problem before but now the weather has gotten colder the system has come on. It runs from 6:30am to 11:15pm.
For the past few days every morning at 6:30 I am awoken by what sounds like water running through the pipes and radiators in flat and a clicking sound. It sounds louder in the living room which is the first room the heating passes through. It seems to stop and go silent after 30 mins to an hour and doesn't return till the next morning.
I have no idea what the cause is. I have tried bleeding the radiators but no air comes through, only water. All radiators when turned on get fully hot so I don't think that's the problem.
All radiators are fitted with Drayton TRV4's but pretty sure they are wearing out and have some new ones arriving tomorrow. Would that solve the problem or could it be something else? Any help would be greatly appreciated

 

[Rodders53]

Sounds fairly normal. Water flow through pipes heard when being pumped. Clicking is expansion and contraction of parts with heating / cooling.

You may be hearing the Communal Heating supply pipework feeding to the Heat Unit Interface in your dwelling... Is it possible you have a hot water cylinder that calls for heat at 630 am each day? It'd possibly take around 30 minutes to reheat (I have mine set to heat for 1 hour each day around the time we shower)?

TRVs heads don't wear out. They fail completely. Think you will have wasted your money if you hope they will fix this noise.

More often the fixed valve actuation pin 'sticks' and needs to be freed/lubricated. Changing those if they need done is a drain down system job for a plumber.

 

[JohnD]

Does the noise stop if you turn the TRV heads a bit in either direction?

 

[Jayt08]

The noise stays the same no matter what setting the TRV is on. Even if it's turned to off

Does the noise stop if you turn the TRV heads a bit in either direction?

 

[Jayt08]

Sounds fairly normal. Water flow through pipes heard when being pumped. Clicking is expansion and contraction of parts with heating / cooling.

You may be hearing the Communal Heating supply pipework feeding to the Heat Unit Interface in your dwelling... Is it possible you have a hot water cylinder that calls for heat at 630 am each day? It'd possibly take around 30 minutes to reheat (I have mine set to heat for 1 hour each day around the time we shower)?

TRVs heads don't wear out. They fail completely. Think you will have wasted your money if you hope they will fix this noise.

More often the fixed valve actuation pin 'sticks' and needs to be freed/lubricated. Changing those if they need done is a drain down system job for a plumber.

It's good to have spares as I've had a few TRV4 heads break (hopefully they've improved them in the past couple of years) I was kinda hoping that might improve things. The annoying thing is I can't change what time the boilers are turned on as it's a communal system. Thing is I have lived here 10 years and never had this before. A company usually comes before the start of winter and flushes the system...i think. Pretty sure they came recently.
I know it's nothing to do with the hot water cylinder or the pipework for that. It's only the central heating ones making the noise. It's a lot louder than normal water flow, hard to explain but kinda clicky drippy if that makes sense

 

[gas112]

its air in the system that has collected over the summer and with it being communal it will have to be bleed from highest point of the system

 

[Rodders53]

Have you had your dwelling's system serviced and any controls adjusted ?

Unless the In-home Heat Unit controls are set to come on at 0630 to heat your dwelling or hot water and your pump is running (too fast, perhaps) then it's out of your direct control...
Ensure all your heat controls are off last thing tonight (as you'd set them when away on holiday or literally off at the mains isolatprs/MCBs) and see what happens tomorrow morning...

Same noise = communal issue and report it to Factors/Buildings Management/ Communal Heating operations staff. {Also check if neighbours are having similar new symptoms this year.}

 

[Mottie]

Open up your return valves on the rads to let the water flow quieter, it will do this when there’s less restriction - that’s what I have to do on mine. The clicking noise is the rads expanding as they get hot. You may have the insulators missing from between your rad and the bracket but you’d have to take the rad off to see that. It they are missing, they are cheap and easy to replace.

https://www.amazon.co.uk/Decoralin-Radiator-Vibration-Inserts-Universal/dp/B0BTWFYF6W/ref=asc_df_B0BTWFYF6W/?tag=googshopuk-21&linkCode=df0&hvadid=696285193871&hvpos=&hvnetw=g&hvrand=10429233258105838504&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=1006668&hvtargid=pla-2281435177418&psc=1&mcid=b8f8d1abaddb3cf48c34aa41fd717d97&hvocijid=10429233258105838504-B0BTWFYF6W-&hvexpln=74&gad_source=1

 

[Jayt08]

its air in the system that has collected over the summer and with it being communal it will have to be bleed from highest point of the system

I pr

Have you had your dwelling's system serviced and any controls adjusted ?

Unless the In-home Heat Unit controls are set to come on at 0630 to heat your dwelling or hot water and your pump is running (too fast, perhaps) then it's out of your direct control...
Ensure all your heat controls are off last thing tonight (as you'd set them when away on holiday or literally off at the mains isolatprs/MCBs) and see what happens tomorrow morning...

Same noise = communal issue and report it to Factors/Buildings Management/ Communal Heating operations staff. {Also check if neighbours are having similar new symptoms this year.}

The only controls for the central heating inside the flat is the TRV's on each radiator. Everything else is hidden in the apartment blocks boiler room. For hot water I have a hot water cylinder which I have my own timer for, that's not on when the noise happens plus it's on different pipework.
The person managing the block is away on holiday at the moment but as soon as they are back I will be onto them and I'll also ask neighbours if they have the same problem.
One question I have is should I try bleeding the radiators again when the system turns off at 11:45pm? As when I bleed them before the system was running even though I had my radiators turned off