Vaillant Ecotec 637

Joined
25 Jun 2007
Messages
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Location
London
Country
United Kingdom
Hi all,

I seem to have air in my system. pressure drops and started to happen after a diverter valve for UFH was replaced. Also getting banging noises, which die down after the temp setting on boiler turned down.

Manual says for diagnostics : test programs will be started when POWER ON is turned on and the + key is pressed for 5 s.

How do I turn the power on? -apparently, it sets the pump to running intermittent mode and manual does not tell this?

Please reply back, thanks.
 
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