Atwood Water Heater shutting down fix
I posted a thread over on the Lance Truck camper forum about my Hot Water heater that would mysteriously shut down over and over again after about 5 seconds of ignition. I did some experimenting and t...
Forum Discussion
Flame Proving signal is generated by MAIN FLAME.......ionization creates AC Milivolts.
Signal goes back to circuit board to PROVE flame is lit.
W/O signal circuit board shuts gas valve.
Spark Electrode Assembly mounting screw proves one source of grounding for electrode----clean/tight connection
Spark Electrode High Tension wire connection at transformer needs to be clean/tight
Spark Electrode Ceramic insulator....if cracked signal will track to ground vs getting back to circuit board (fire off WH at night in dark and watch for tracking)
Spark Electrode needs to be 'engulfed' in Main Flame so signal can return...any sooting/carbon on electrode tip will stop milivolt signal
Spark Electrode Gap needs to be 1/8" for a good strong spark
Ground wire from connectr to WH frame..clean/tight
Circuit Board mounting screw.....provides grounding
Doesn't take much to stop that AC Milivolt Signal
Signal goes back to circuit board to PROVE flame is lit.
W/O signal circuit board shuts gas valve.
Spark Electrode Assembly mounting screw proves one source of grounding for electrode----clean/tight connection
Spark Electrode High Tension wire connection at transformer needs to be clean/tight
Spark Electrode Ceramic insulator....if cracked signal will track to ground vs getting back to circuit board (fire off WH at night in dark and watch for tracking)
Spark Electrode needs to be 'engulfed' in Main Flame so signal can return...any sooting/carbon on electrode tip will stop milivolt signal
Spark Electrode Gap needs to be 1/8" for a good strong spark
Ground wire from connectr to WH frame..clean/tight
Circuit Board mounting screw.....provides grounding
Doesn't take much to stop that AC Milivolt Signal
