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O/T GREENSTAR 30CDi boiler display appears to be reading artificially high



Papak

Not an NSC licker...
Jul 11, 2003
1,905
Horsham
Afternoon NSC,

The above boiler has operated faultlessly for the past 5 years.

However, I have noticed that the DHW for the past few days has not been as hot or lasted as long as previously - been using the immersion to help. Not sure on tank size as at work currently.

I have turned it off and back on again but not sure it made any difference. I did notice the display flashed " -I I- "after the reset.

The temperature display appears to read ~20°C higher than normal. E.g. 39 to 41 when at rest and cold rather than 20 normally. It also seems to read a similar amount lower when finished a DHW cycle.

Is this display for the output side of the boiler rather than the return?

Any ideas on what might be wrong?


Many thanks!!!
 




Papak

Not an NSC licker...
Jul 11, 2003
1,905
Horsham
Bumping for prime time heating engineers on the board- I thought they might have all already knocked off for the day when I posted at 15:00 but maybe I was wrong #brexit #barberout
 




Honky Tonx

New member
Jun 9, 2014
872
Lewes
Ones imagines that there were a few over heating old boilers at the Stevenage last Saturday.
 


Rowdey

Well-known member
Jul 7, 2003
2,536
Herne Hill
Back to front 't' are condense trap priming - usually because power has been interrupted. Been serviced recently?

The pumps can go on these - might be not circulating, and overheating.

How do the flow and return feel when on HW and CH..?

Difficult to say without being in front of it of course.
 




Papak

Not an NSC licker...
Jul 11, 2003
1,905
Horsham


Papak

Not an NSC licker...
Jul 11, 2003
1,905
Horsham
Back to front 't' are condense trap priming - usually because power has been interrupted. Been serviced recently?

The pumps can go on these - might be not circulating, and overheating.

How do the flow and return feel when on HW and CH..?

Difficult to say without being in front of it of course.

Thanks for your reply. I will check and report back.

Never been serviced although I did reset earlier to try and resolve the issue.
 


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