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Mend Vaillant ecoTEC plus 18 T3W Combi Running Heat

vaillant 18 t3w combi?

t3w 18 combi pilot light okay and lit ,pump running but

no heat or hot water,differential valve okay.solenoid does not lift .overheat stat okay faulty solenoid or pcbnot sending electrical signal?

c.ford
January 2011

Vaillant Vaillant ecoTEC plus 18 T3W Heating, Home Heating Systems Combi Running Heat

is fan running ? if not check fan if running check fan pressure switch every boiler has a lighting sequence check each part in sequence don't jump ahead

brian
January 2011

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Vaillant ecoTEC 18 T3W: No Heat/Hot Water