Hot rads when h/w is on

[king]

Hi.i have a potterton prima,
The problem is the rads are getting v hot when boiler is heating the water.It had a new motorised valve about 18 months ago.
any ideas please/cheers.

 

[ChrisR]

You don't say whether you have 1 or two MV's, or what type. Try a whack with a screwdriver handle on the (CH?) valve - more info required.

 

[king]

Re the motorised valve it is a Myson power extra and it is the only one on the system.It has 2 x lights on the top on for ch,and one for hw.Is the ch valve part of the combined motorised valve?????.
thanks for any help.

 

[drbagiva]