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Posted by Dave on October 18, 2011 at 16:55:13:
In Reply to: Re: Lochinvar EBN300 will not stay lit posted by HeatPro on October 18, 2011 at 14:06:04:
: Check if you still have a working outdoor sensing thermostat on the system. Mild weather would keep the boiler temperature down to prevent wasteful high temperatures when not needed.
The outdoor sensor is just a simple switch that only allows the high fire burner to fire below 20 degrees F. Otherwise, the regular burner fires. What is happening now is that the burner only lights for 10 sec before turning off. The gauges do not show any spike in temp. Flow sensor seems like it is working OK as burner cannot light if flow sensor is not functioning.