I have a vaillant ecotec pro28. The error code f29 flashed up I reset the boiler and worked fine for a couple of hours. This process carries on all the time. I've spoke to vaillant technical they told me to check gas pressures and the earthing and everythings ok. I have now noticed that the spark electrode is constantly sparking even though no heat or hot water is being called for.
Has anyone else come across this problem? Please help
Has anyone else come across this problem? Please help