I recently had my loft converted and as part of this i had an Ariston e-combi boiler fitted and the 1st floor radiators are only heating up at the bottom of the radiators. I dont have TRV's fitted anywhere or a wall mounted remote thermostat. The previous system was a water tank and hot water cylinder with a 3 port valve and pump which the builder removed. Unfortunately i am in dispute with the builder so cant get him to return Any suggestions?