Does 'main eco compact error 133' mean there's a problem with the boiler's fan?

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Grade: Education Subject: Support
Does 'main eco compact error 133' mean there's a problem with the boiler's fan?
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While a faulty fan can sometimes contribute to ignition problems, 'main eco compact error 133' is more directly related to the ignition and flame establishment. However, if the fan is not running correctly, it might not be drawing enough air for combustion, indirectly leading to ignition failure and this error code.