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Posted by Harold hydronicnetwork.net on January 11, 2004 at 09:12:35:
In Reply to: Heatmaker Hw-M2 Series posted by Jesse on January 11, 2004 at 09:02:54:
The flame sensor probably needs cleaning. Also the heatmaker temperature sensor may be sensing the hot water at the top of the tank fitting and not be as accurate when driven to high temperatures inn cold weather. Be sure the vent is free of frost.
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