Hi all. Put my first vaillant heat only in last week (usually fit worcester). Have a s.53 code continually come up which means lack of flow. Have checked:
1) pump
2) Valves
3) AAV's in all the right places
The tech line says its lack of flow causing to bigger difference in the temp of the flow and return.
the only thing I can think is that when the boiler 22mm feed disappears into the floor it looks like maybe the whole house has been run in 15mm. Would this be enough to throw it off? Obviously the previous bliler was less high tech so it wouldn't have been bothered. I opened the auto bypass fully but still having problems. Anyone had similar problems?
1) pump
2) Valves
3) AAV's in all the right places
The tech line says its lack of flow causing to bigger difference in the temp of the flow and return.
the only thing I can think is that when the boiler 22mm feed disappears into the floor it looks like maybe the whole house has been run in 15mm. Would this be enough to throw it off? Obviously the previous bliler was less high tech so it wouldn't have been bothered. I opened the auto bypass fully but still having problems. Anyone had similar problems?