Graham Mark (@grahammark1978) 's Twitter Profile
Graham Mark

@grahammark1978

Domestic and Commercial engineer.
Heating, hot water, catering, G20, G31, oil, G3.

ID: 146995850

calendar_today22-05-2010 23:06:58

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Anyone had an F13 "short circuit cylinder sensor" on a Vaillant system boiler before. It is a 100kw ecotec but fault codes are fault codes. NTC's all correct. No cylinder sensor installed. New PCB fitted. Vaillant engineer never seen it.