Whistling TRV

[wisey]

Hi Guys,

I'm sure this has been posted before by other people but my search keeps timing out.

I have TRV's an all bar 1 rad in my 1930's terrace. ( 7 with). The one in
the front room has recently started whistling when the heating is on, although it is not everytime and if I turn it down a bit it stops.

The TRV's are (I think) Drayton TR4 valves and were only fitted in Oct last year. As far as I can tell they are all on the flow to the Rad.

Any ideas as to why this may have started ? is something getting stuck ?Does this do any harm or is it just an annoying noise (don't like the tune it is whistling) and any ideas how to cure it.

I did have one of the valves do this a couple of months ago but that seems to have cured itself

cheers guys

 

[Soggy_weetabix]

change it

 

[wisey]

even though it is only 3 months old.

It only seems to do it when weather is really cold and heating on for more
during the day.

 

[Nige F]

set it to the next higher number on the dial

 

[Soggy_weetabix]

bung the system, and change like for like. Get refunded fo a faulty valve and all you have done is wasted half an hour of your time for a noise free working TRV.

David

 

[wisey]

Spoke to guy who fitted the valves and he suggested

1) Turn up to next number (as Nige F suggested) and then back down to
desired setting or
2) Pump speed may be too fast.

What speed should pump be running at. I have a Potterton Suprima 40l supplying 8 rads, 7 with TRV 1 without.

Thx

 

[Nige F]

Lowest speed commensurate with adequate circulation to the farthest reaches of the heating circuit Start @ No. 2

 

[ChrisR]

Just turn down the lockshield valve (the one the other end) a bit. Try it just one turn open.