Vaillant EcoTec Exclusive 365/5-7

[david isom]

My boiler is in continuos S40 mode. A reset fixes for a while and then it comes back. There are no f codes and the only other possible problem is the diagnostic code 118 reports 8 which is the CO2 sensor . The manual says that this number means Standy Reference resistance not OK . It has been like this for a long time . Does anybody know if this would cause boiler limiting ?

 

[Deleted member 120897]

The comfort mode is active (S40). Do you have any dripping taps? Any issues with the hot water?

 

[david isom]

The comfort mode is active (S40). Do you have any dripping taps? Any issues with the hot water?

 

[david isom]

everthino works but temperature is erratic. Ok after a reset until it goes into S40

my question is about d118 code 8