Porcelain points
I just got my BT Cruiser back from 4 seasons rv where they got the furnace working. I've read and watched a lot of stuff about Suburban furnaces but never heard of what they diagnosed which was " crac...
Forum Discussion
The 'Spark Electrode' has a ceramic insulator that the High Voltage wire runs thru to connect with electrode.
Transformer on circuit board sends 2000+ Volts thru that electrode for spark
BUT more importantly that electrode is used as return for milliamp flame proving signal that circuit board must receive or it shuts down firing
Cracked ceramic insulator will 'leak' that milliamp signal to ground and not return it to circuit board.
Example of a Spark Electrode.....white portion is the ceramic insulator
'Service Guy'.......hopefully that was just the counter person and NOT the actual tech :S
Transformer on circuit board sends 2000+ Volts thru that electrode for spark
BUT more importantly that electrode is used as return for milliamp flame proving signal that circuit board must receive or it shuts down firing
Cracked ceramic insulator will 'leak' that milliamp signal to ground and not return it to circuit board.
Example of a Spark Electrode.....white portion is the ceramic insulator
'Service Guy'.......hopefully that was just the counter person and NOT the actual tech :S
