Tapping & Hammering Noise from pipes & rads

[Lk1980]

Hi

I have valiant Turbomax Combi about 4 years old. The rads were quite old so got them replaced by the new convector types. Earlier it used to be fine. However a few days back, they have started to make strange noise. One of the radiator constantly makes a tapping noise at a regular intervals and 1 towel radiator upstairs in the bathroom regularly makes a hammering noise.

I tried to bleed the radiators all fine but in 2 rads the water does not come out with force rest are fine. when these rads were installed they all were working fine. These noise has taken our peace away especially early hours in the morning.

Can someone please help??????????

Many thanks
B

 

[fitz1]

have you got trvs on the said rads.

 

[Lk1980]

Hi Thanks for the prompt response.

Yes I have got TRV's on all the rads but no trv on the towel Radiator.

have you got trvs on the said rads.

 

[fitz1]

take the head off the trv and see if the noise stops

 

[fitz1]

take the head off the trv and see if the noise stops

 

[Lk1980]

Hi Fitz1

Tried but there seems to be no light at the end of the tunnel.

take the head off the trv and see if the noise stops