Vailant turbomax combi boiler with 13 rads. The last rad on my system on 1st floor (furthest from the boiler) is cold and only heats up if i turn the rest off.
This is a newly added rad by the previous owner when he had an extension done and it is supplied via plastic pipes.
Do you think that I need to add a second pump to the system upstairs?.
Do you think there are too many rads on the system?.
I have bleed the system and emptied/refilled as I added a rad in the porch.
This problem has been since I owned the property before I did any work on it.
Boiler is working ok as had problems with it that have been repaired be vailant engineer. (in previous thread)
This is a newly added rad by the previous owner when he had an extension done and it is supplied via plastic pipes.
Do you think that I need to add a second pump to the system upstairs?.
Do you think there are too many rads on the system?.
I have bleed the system and emptied/refilled as I added a rad in the porch.
This problem has been since I owned the property before I did any work on it.
Boiler is working ok as had problems with it that have been repaired be vailant engineer. (in previous thread)
they haven't much plumbing experience or they real diy men and don't know what their at. they tend to try and feed heating circiuts off 15mm supplys, when 15mm should be only taken to the last 3 rads, provding the rads aren't too big. balance the system by turning off the lockshield radiator valve (ie the one u need to remove the plastic cap and turn with pliers) the just crack it open until it comes on. you will need to do this to all the rads and u should find u have to open the lockshield side more and more as u get away from the boiler. if it is just one individual rad not heating then it could be a faulty thermostatic rad valve. take the head off and push the pin down a few times. this can release it.