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Vaillant error message "Con"?

My Vaillant EcoTec Plus isn't working. It jys flashes the message "Con" on the LCD panel. How do I fix this? Many thanks.

James
July 2010
VaillantHeating, Home Heating SystemsVaillant Ecotec Working
CON on this boiler means ""communications error" look for a loose/disconnected wiring harness. If everything looks good get a engineer in. It will work out cheaper in the long run and will save you a lot of head scratching.

M
July 2010
Wrong Answer

the gasser
July 2010
condenshion trap blocked or full, check the out let outside is clear first, the the trap in the boiler.

erj
July 2010

Automatic Answer

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