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Posted by HeatPro on October 24, 2010 at 14:01:51:
In Reply to: Vaillant VCW GB 242EH locks out but only with hot water - help posted by Rob Rhind on October 07, 2010 at 08:40:19:
Diverters for the hot water often become 'sticky', which is why in Europe, the service company will disassemble and clean the heaters yearly to prevent such problems. Yearly service is new to Americans.
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