CSI 85 Fault

[john306]

Hi, any help appreciated with my CSI 85 that's been in the house 12 years according to the documentation.
Any of the following can occur.........
1) While sparking to try to ignite pilot the gas valve clicks and boiler begins start up sequence again.
2)With pilot alight for no more than a second, the gas valve clicks and boiler begins start up sequence again.
3) With main burners alight for no more than a second, the gas valve clicks and boiler begins start up sequence again.

Any of the above can occur frequently although the boiler always does fire eventually taking from 1 to 5 shutdown/startups.

Fan is new, pressure switch is new, DHW thermister is new.

Any other ideas I can try out?
I have got my qualifications but only ever done installations not breakdowns.

Thanks for any help

 

[Agile]

We don't give advice on gas/combustion related aspects here.

Apply for access to the Combustion Chamber part of the site.

Some rather odd discussions going on there at the moment but hopefully they will all settle down soon!

 

[john306]

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