clicking pipes (or valves) -need help please

[demented]

Can anybody please help. Have just moved house and had a combi boiler fitted and trv's on radiators. the upstairs still have old valves on other side of radiators. when the boiler shuts down we get loud clicking from which I think is the valves and hammering from pipes. this seem to go a thousand times worse when heating is turned to a lower temperature or tvr's turned down. please, please help, I haven't had much sleep with these noises.

 

[ollski]

sounds like one way trv's on the wrong end ie return or maybe just cheap crappy trvs!

 

[demented]

the tvr's are on the end of the radiators the get hot last, is this right or wrong??? please

 

[demented]

sounds like one way trv's on the wrong end ie return or maybe just cheap crappy trvs!

the radiators start to get hot on the end without the trv's

 

[ollski]

have they got an arrow on them on the body indicating direction of flow, yours are on the return but there is a chance they were made to go on the return or either. Most old ones were made to be fitted on flow though.

 

[demented]

they have two arrows - one pointing to the radiator and one to the pipework and they clank like mad, i even hear it downstairs

 

[ollski]

have you got trv's on all of your rads and what boiler do you have?

 

[demented]

all but the bathroom, the boiler is a falcon II, any help? It is only the upstairs ones that make the noise , if I turn them down the smaller bedroom stays red hot and the two large bedrooms stay cool. I have to turn the heating up and valves wide open and shut boiler off and restart to make it quieter (not a lot)