VHE 3 Weil McLain boiler mercury flame sensor problem

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Old 10-23-11, 05:14 PM
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VHE 3 Weil McLain boiler mercury flame sensor problem

I have a Weil McLain boiler with a mercury flame sensor. Replaced the Mercury Flame Sensor 1 week ago and it solved the problem. Burners would not flame. Now it is acting the same. pilot ignites but the burners do not. What could be the problem?
 
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Old 10-28-11, 10:46 AM
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Check to make sure the flame sensor is being heated by the pilot. Maybe something moved.
 
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Old 10-28-11, 03:43 PM
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Check all the GROUND CONNECTIONS. These systems require clean, dry and tight ground connections to operate properly... and as Carbuff says, make sure the sensor is in the flame.
 
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