Spillage on inside of case (Worcester Greenstar 24i System, 2001)

[sammathias]

Did you fga it with the case on tho?

 

[cr0ft]

Yes, 10.3% CO and 0.002 with 125 parts CO on max rate.

Ratio down to 0.0005 with new Case seal so something was going on for sure.

 

[Starky]

Another one for heat and dust. Used to see this on old isars and icos boilers.

 

[masons]

these combustion boxes are not sealed anyway look in the 4 corner at the back , anyway probably time to change the read seal judging by the amount of staining there and that IS NOT a normal/common amount of black marks/staining within the worcester ( especially system boiler ) and while your at it i expect the heat exchanger could do with cleaning with constant over gassing , you can tell by measuring the fan pressures if it does , but the gas valve on these constantly change from year to year so need adjusting every service probably . probably see about 600 - 800 of these boilers a year