vaillant atmomax plus open flued combi problem

jag1664 · 31 Jan 2008

I have a Vaillant Atmomax plus combi boiler here in spain. I am consistantly getting a F36 fault code registering. The boiler has been fitted with an add on fan it has had an extra rad added to the heating sysem. I do not have access to the fault codes or installation instructions in english or spanish.
Is it likely to be a flue problem, flowswitch or diverter valve problem.
Any help greatly appreciated

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vaillant atmomax plus open flued combi problem

jag1664

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