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had new central heating system install this week oil boiler the works. sparky rewired for controls new danfos fp715si..he used my old room stat as was better than one supplied. room stat is a danfoss ret230-nsb. old system stat has green and red lights that came on when control turned on heating...

Just had camry5 combi fitted ,new pipe work and seven new double rad`s,room stat, 7trv`s and programmer. Problem all rad`s seem hot at top and extending down but bottoms are cold.How can I overcome this problem.Havn`t tried bleeding rad`s not sure with sealed system.