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Mend Vaillant Ecotec Error Code

My boiler is showing an F?

I have turned my heating to on and water to on, but nothing has come on. My boiler is showing an F on it.
Its a vaillant ecotec boiler

Eileen Jackson
September 2008
VaillantVaillant EcotecHeating, Home Heating SystemsVaillant Ecotec Error Code
Think F stands for FAULT, need to call a heeting engineer.

JB
September 2008

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Vaillant Ecotec Boiler Showing F Error - Help