Hi. I am unable to repressurise my boiler after draining to remove some pipes. I have done this several times before it was moved into the loft. The guy who moved boiler is stumped and recons boiler is faulty. It's only 3 years old. Only a small amount of water enters boiler before it stops. Guage shows no reading and fault code is 118 or 119 low pressure (not home atm). Only 1 rad on system atm as replastering if this means anything Why won't it fill up? Any help appreciated