Hi
My dad's heating suddenly packed up on Thursday, of course just as the temperature really dropped. It's intermittent and will work about 20% of the time but mostly it won't.
The ecotec 415 is about 10-15 years old and has been serviced regularly, almost every year like clockwork. The display status lists S.30 which I have found in the manual as "Room thermostat is blocking heating mode." Before calling out an engineer I checked the basics like the thermostat (Drayton RTS9) and confirmed that it is switching 230v to the boiler when the call for heat indicator is lit. I then removed cable 4 from the boiler's control block and linked terminals 3 & 4 to override the external controls and to attempt to force it to fire in heating mode. Nothing changed and S.30 was still displayed on the panel.
I then had a Vaillant authorised company out on Saturday morning but of course it decided to work perfectly and he couldn't find any faults anywhere. He spent a good hour checking the stat, programmer, diverter valves, etc and reported that everything tested as expected.
I am technical in nature and by day job. This is clearly an electronics issue rather than gas and so I don't mind having a look within reason. If I can arrange to be there when the system is not working, is there anything in particular anyone can suggest that I should check with a meter? In my, what I think is a reasonably logical, mind if linking terminals 3 & 4 is supposed to force the boiler to fire in heating mode but it doesn't, that indicates an issue with the boiler's internal control logic, no? Happy to be corrected!!!!
Thank you very much
My dad's heating suddenly packed up on Thursday, of course just as the temperature really dropped. It's intermittent and will work about 20% of the time but mostly it won't.
The ecotec 415 is about 10-15 years old and has been serviced regularly, almost every year like clockwork. The display status lists S.30 which I have found in the manual as "Room thermostat is blocking heating mode." Before calling out an engineer I checked the basics like the thermostat (Drayton RTS9) and confirmed that it is switching 230v to the boiler when the call for heat indicator is lit. I then removed cable 4 from the boiler's control block and linked terminals 3 & 4 to override the external controls and to attempt to force it to fire in heating mode. Nothing changed and S.30 was still displayed on the panel.
I then had a Vaillant authorised company out on Saturday morning but of course it decided to work perfectly and he couldn't find any faults anywhere. He spent a good hour checking the stat, programmer, diverter valves, etc and reported that everything tested as expected.
I am technical in nature and by day job. This is clearly an electronics issue rather than gas and so I don't mind having a look within reason. If I can arrange to be there when the system is not working, is there anything in particular anyone can suggest that I should check with a meter? In my, what I think is a reasonably logical, mind if linking terminals 3 & 4 is supposed to force the boiler to fire in heating mode but it doesn't, that indicates an issue with the boiler's internal control logic, no? Happy to be corrected!!!!
Thank you very much
