Hi All,
Have thoroughly searched the forums but can't seem to find the answer for this but it has helped me check things.
Our House is a fairly large 3,300 square foot detached house. I had fitted about 7 years ago a new Vaillant 438 boiler to replace 2 really old crumby ones (one did downstairs and one did upstairs).
But the hot water has never worked properly - The plumber who installed it could only get it to work by having it on 24 hours so I never really worried too much.
However with the cold weather of the last few days I really noticed that the radiators were struggling to get the hosue to 21c - we were lucky to hit 19.
Checking the boiler I noticed that s.53 was showing all the time - some research on here quickly helped me fix that issues - I changed d.0 to 32 from 38, d1 from 5 to 8 and d2 from 20 to 10
I also changed the heating curve from 2.1 to 2.6
Now the house was warming up and the heating worked great!
After sorting that out - I wondered about my hot water issues - so I ran the hot tap for a while and waited for the boiler to kick in - started heating nicely - I did not see what temperature it reached, then quite quickly I got s.53 code again - which I think means the differential between temp in and temp out is too great. Waited for that to cycle it repeated the process again once more. Third cycle it seemed to heat up for much longer this time and now the code was s.28 the anti cycle, this has now repeated 3 times - each time wwater goes up to 82 or 83 degress heating stops and s.28 is displayed.
Another issue I noticed is that when all this was going on with the hot water - the radiators were not getting any heat ad the boiler seemed to b locked into hot water mode.
I do not think that the plumber when he installed the system changed the circulation pump to a more powerful model - though this weekend I will take the cupboard back off to gain access to the pumps to check.
That said - has anyone any suggestions on how I can improve the performance of the system - specifically the hot water?
So that it stops the s.53 code and stops locking out the heating when it takes an age cycling to heat up the hot water?
Many Thanks
Stuart
Have thoroughly searched the forums but can't seem to find the answer for this but it has helped me check things.
Our House is a fairly large 3,300 square foot detached house. I had fitted about 7 years ago a new Vaillant 438 boiler to replace 2 really old crumby ones (one did downstairs and one did upstairs).
But the hot water has never worked properly - The plumber who installed it could only get it to work by having it on 24 hours so I never really worried too much.
However with the cold weather of the last few days I really noticed that the radiators were struggling to get the hosue to 21c - we were lucky to hit 19.
Checking the boiler I noticed that s.53 was showing all the time - some research on here quickly helped me fix that issues - I changed d.0 to 32 from 38, d1 from 5 to 8 and d2 from 20 to 10
I also changed the heating curve from 2.1 to 2.6
Now the house was warming up and the heating worked great!
After sorting that out - I wondered about my hot water issues - so I ran the hot tap for a while and waited for the boiler to kick in - started heating nicely - I did not see what temperature it reached, then quite quickly I got s.53 code again - which I think means the differential between temp in and temp out is too great. Waited for that to cycle it repeated the process again once more. Third cycle it seemed to heat up for much longer this time and now the code was s.28 the anti cycle, this has now repeated 3 times - each time wwater goes up to 82 or 83 degress heating stops and s.28 is displayed.
Another issue I noticed is that when all this was going on with the hot water - the radiators were not getting any heat ad the boiler seemed to b locked into hot water mode.
I do not think that the plumber when he installed the system changed the circulation pump to a more powerful model - though this weekend I will take the cupboard back off to gain access to the pumps to check.
That said - has anyone any suggestions on how I can improve the performance of the system - specifically the hot water?
So that it stops the s.53 code and stops locking out the heating when it takes an age cycling to heat up the hot water?
Many Thanks
Stuart