i recently had a leak in the 6" rubber pipe in my vaillant boiler. I drained the system and replaced the pipe. i pressurised the system as in the instalation manual but the boiler mainly runs on status code 6 which is Boiler shut down on CH or DHW thermostat. when i run the hot tap the boiler fires up and runs normally on the hot water side. with tap off it goes back to status 6. when heating is switched on there is no change from status 6. any advice would be appreciated.

Askamsandrat.., January 2010

Bumping an old question to say: did you ever get an solution? We currently have the exact same problem with our EcoMAX 828E.

Not sure if the status = 6 indicator simply means that either the thermostat or the rotary timer is not sending the required signal to the boiler, so the boiler thinks there is no need to switch the CH on.

BP, October 2012