here`s a good un

[yorkyuk]

My central heating will run for approx 90 mins then the water pipes start vibrating.To stop the vibration i have to turn my thermostat valve in the bedroom 1/4 turn.
This will keep the heating quiet for up to 1hr when the same must be done.

The system has been bled several times with no altertion of the fault(air was not present after the first bleed)

I have recut the joists i can find to lift the pipes off them and even put rubber gromits to seperste the inlet/outlet pies to no avail.

Any ideas or suggestions would help,my local plumber will only come out when the vibration noise is present and as is when he comes the noise had stopped and he would not give any suggestions,just told me to ring next time it happens

 

[Biggles..]

could you give boiler make and model

System decription ie combi, y plan, s plan

The valve type ie lockshield or trv

 

[hi-spec plumbing heating]

if it has a trv fitted , change it and fit new.
try opening it fully for now.

 

[namsag]

Sounds like your trv is on the wrong side take the head off and if it stays quiet it needs moving to other side of rad

 

[Biggles..]

or just change it for a bi-directional trv.

 

[yorkyuk]

boiler is ravenheat fanned combi rsf 84e

lockshield or trv dont understand sorry

 

[hi-spec plumbing heating]

now your confusing the issue theres no mention of the valve being taken off.
so it has no reason to be on the wrong side.

 

[doitall]

is this more a knocking sound than a vibration

next time it does it turn the TRV to a higher setting and it should stop.

If so post back and I'll tell you what to do.

 

[hi-spec plumbing heating]

trv - is it a termostatic valve on the rad ?

 

[Biggles..]

TRV- themostatic rad valve which is what i've just re-read that you have to adjust.

Damm too slow.

 

[yorkyuk]

yes trv on all rads they are all set fully open to (hopefully) enenly distribute the heat

 

[hi-spec plumbing heating]

there must be one without the trv thats the one with the room stat near.

 

[yorkyuk]

the one without is in the bathroom but the stat is in a bedroom

 

[hi-spec plumbing heating]

where is your heating wall stat

 

[clf-gas]

where is your heating wall stat

Er!

the one without is in the bathroom but the stat is in a BEDROOM