radiators not hot

Hi all, just wanted to get some peoples opinions. A new customer of mine has asked me to look into what he can do about his heating system not heating up downstairs radiators sufficiently. He has recently had a extension and a new 32kw oil system boiler with 15-60 130 pump fitted outside. The...

Hi guys, any help would be greatly appreciated. I have a riello rdb oil boiler. We only moved into the house a few months ago and have noticed the radiators are never hot- just lukewarm. All the radiators are the same. The boiler looks relatively new. I have the thermostat on the boiler turned...