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3. The Electrode Assembly (continued)
If no s ~ a r k is Dresent, check the followina:
a) Check for voltage to the circuit board. Terminal 1 should have voltage. If no voltage, clean wire
connections at circuit board with pencil eraser.
b) If still no voltage, check voltage through E.C.O. and thermostat. Make sure there are good
connections and voltage present. If voltage is present on one side but not the others, replace
thermostat or E.C.O.
c) If voltage is present through E.C.O. and thermostat to the module board, and no sparking occurs,
replace the circuit board.
d) After replacing the circuit board, if there is still no spark, check the high voltage wire for cracks or
breaks, and replace if necessary.
4.
Gas Valve Malfunction
With power supplied to ignitor, sparking should occur and the gas valve should open simultaneously.
If sparkina occurs but the valve does not oDen, check the followinq
a) Place a voltameter between terminal 4 on the input connector and ground (or across the valve).
Recycle the ignitor by turning the ONIOff switch to "off" for 5 seconds and then back on to determine
if voltage is present at the valve.
b) If voltage is present and the valve still does not open, remove wires from valve terminals and retest
the valve on a known voltage source. If valve still does not function, it should be replaced.
c) Check the circuit board connector for good connections.
d) If voltage is not present at terminals 4 and 6 or at the valve, replace the circuit board.
5.
Circuit Board Failure
a) Check for the correct voltage (between 10.5 volts and 13.5 volts DC). Excessive voltage will
damage the circuit board.
b) Check spark gap. If the gap is too wide and arcing to ground, damage can occur to the circuit
board.
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