Hi , My vaillant eco is roughly 10 years old and as started regularly to get this fault Number on it ( fault 23 ) it clears when I reset it. Does any one know what this fault refers to.
Thanks
Thanks
Vaillant gas boiler fault
- Thread starter John1954
- Start date
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Manual says
Water shortage, temperature difference between flow
and return NTC too large
Pump blocked or defective, pump output too low
Could be low on water or pump is going or system is getting blocked up..
Water shortage, temperature difference between flow
and return NTC too large
Pump blocked or defective, pump output too low
Could be low on water or pump is going or system is getting blocked up..
it will be in your service and user instruction book which your installer should have left you!
OK,
Thanks for your help, it has just done it again. Seems to be getting worse by the day
Thanks for your help, it has just done it again. Seems to be getting worse by the day
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Sorry to be so long answering, not for the last 3 yearst to my knowledge
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