Back Boiler disconnected. Downstairs Rads luke warm

[creekchubpikie]

Bought a 60 year old house which had a fire backboiler and an oil fired heating system.
When I turned the oil on, the back boiler heated up and downstairs rads where only luke warm.
I never intend to light the fire so I disconnected the back boiler.
System got power flushed and a new pump installed.
Rads downstairs are still luke warm.
Upstairs and hot water are fine.
Help Please !

Heating system is a 2 pipe system with the pipes entering into the bathroom from outside on first floor.
It seems to be that the water is not being pumped downstairs.
Before and After photos attached.
I connected a hose to the top of the kitchen rad, and hot water came flying out from both pipes so there is no blockages.

 

[Dotty]

You'll need a heating engineer in I'm afraid, my old son. It could be down to a myriad of reasons ranging from being incorrectly installed in the first place to a cock up made when the back boiler was removed.

Whereabouts are you? One of us might be nearby.

 

[creekchubpikie]

I am in Carrickfergus, just outside Belfast. Son knows a plumber so will get him round when he's back from holiday next weekend. Thanks for the reply

 

[Dotty]

One of our members, Best, isn't too far from you.