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Posted by HeatPro on June 13, 2006 at 12:13:10:
In Reply to: Worcester HighFlow400 - no hot water when its a Heat Wave posted by Kate on June 13, 2006 at 11:50:16:
The 'hottest day' non-specific temperature is probably a key piece of info. A controller sensing there is no need for heat, probably wouldn't. A sticky diverter valve or other problem would make no hot water. Just call them and tell them the situation, they probably have a few such to do.