Rad slow to heat up fully

[ZakUK]

It will tell us that the system isn't wildly out and will only need the minimum of adjustments to get the column heating up properly. If it takes more then a more extensive balancing exercise will be needed.
If they all need to be off and there are only 7 rads then that column has a problem with either it's supply or the rad itself. A 2 year old combi on default settings should easily supply all those rads albeit with a bit of setting up.

Complicated stuff plumbing is ...
Ill keep this post updates with my "balancing"

 

[ZakUK]

So yesterday i put lockshield in off position on one of the rad upstairs. This morning turned heating on and opened that lockshield just a little bit and extension rad is fully hot !
Hopefully not some kind of weird one-off coincidence and it will stay that way !

 

[Johntheo5]

What are the ~ lockshield settings of all the rads, including the extension rad?.

 

[ZakUK]

What are the ~ lockshield settings of all the rads, including the extension rad?.

All are fully open, except the one i mentioned above.

 

[ZakUK]

Turned off all at lockshield except the extension rad, put heating on and couldnt get it all hot. Soooo annoying