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thanks for the reply, here's what i tried: 1. cant turn heating only on, water and heating. 2. turned off the ones that worked. 3. both rad valves? i can only turn one, opened it fully though 4. pump is always max 5. dont know what a bypass is, description might help me. this...

water with both the pump on and off.

hello all, my first post and what a great resource this site is. hope somebody can provide some answers for me. first of all i have 2 cold radiators on the first floor, i don't think its a pump problem as the 2nd floor radiators are fine. we recently had a new hot water cylinder fitted and...