Having drained Indirect central heating system and identified that a 3-way motorised valve was required and which is now fitted and wired correctly, I cannot re-fill my radiators! The Water pump is ok and thermostats work ok. But attempting to refill system is impossible.Any iddeas please?
Many thanks for suggestion...but have already done that and water from Supply/header tank still does not allow water to replenish the system i.e. all radiators.
I am now of the opinion that there may be debris in the supply pipe from the header tank and will attempt to "rod" this pipe from the top (from access via the header tank) and then remove the pump and "rod" from access at this point also. I intend to use a flexible "waste-pipe" wire to attempt this task.
Would appreciate your comments.
So very grateful for your concern and reply!! Yes, I had done that - also "rodded" with one of those flexible waist pipe coiled wires, both from the header/feed tank until it would go no further and then from below by removing the pump and "rodding" from that position (having drained the header/feed tank first). But there is something up there that just won't move. So have reluctantly called in a plumber - he is being really good by coming today and I expect him at 2:30pm. I think the answer is to remove a section of copper pipe containing the offending "blockage"and replace it with a new section.
But this site is really great and I do appreciate the responses to my questions.