ichudov wrote:
dougrainer wrote:
The Spark Electrode sense the flame and also sends the spark. IF the spark sparks and lights, then the Piezo tower on the board(where the spark electrode wire spade connects to) is defective OR (most likely) the solders for that Piezo Tower have ben broken loose.
Doug
Doug, sorry, I lost you here, if the spark sparks and lights, then the piezo tower is NOT defective, right?
The flame lights up easily and burns well (it looks like it burns ok)
NO, It does not take much for the Piezo to send the hi voltage spark. A loose connection can do that. BUT, the return flame sense voltage cannot overcome a loose solder connection. I should have worded my post better. The FIRST thing you do is replace the Spark/Electrode assbly. Then check and do the solder if needed. It is RARE for a control board to be the fault from No FL. You can usually tell if the Piezo Tower is loose on the board. Remove the black cover and try to wiggle the Piezo tower. IF it moves slightly, the solders are loose. Doug
