i have a Worcester bosch green star 30cdi boiler, I recently fitted extra 2 radiators to system, the new radiators are not heating up, I have bled them that was fine and they also filled up ok so what could be the problem
air is still in pipes , start boiler close radiators valves all, not new ones you fitted, once it start hot up open others
ltd, October 2013
Try cutting down the lockshield valves on the other original radiators to encourage flow into the new ones. The system is out of balance so needs this to rebalance it and remove any air locks
