10. Can a pilot light be achieved?
Yes
Refer to
Pilot Flame Adjustment Procedure
and
adjust flame if necessary. If adjustment is not
required or unsuccessful, go to step #11.
No
Replace defective gas control valve.
11. Does the pilot flame sensor (th ermopile) generate
450-750 mV?
Yes
Replace defective gas control valve.
No
Replace defective pilot flame sensor.
12. Look through peep hole. Can a pilot flame be
achieved?
Yes
Go to step
#
16.
No
Go to step # 13.
13. Is a spark being generated?
Yes
Go to step
#
15.
No
Go to step # 14.
14. Is the spark gap 1/8" ± 1/32"?
Yes
Replace defective pilot re-light
No
Adjust spark gap.
15.
Yes
Replace defective gas control valve.
Measure continuity across pilot flame sensor's
pins #3 and #4. is it a closed circuit?
No
Replace defective pilot flame sensor.
16.
Yes
Replace defective gas control valve.
After pilot has been lit for 5 minutes, pull pilot
flame sensor's connection off and quickly
measure continuity between pins #2 and #4. Is it a
closed circuit at first and after pilot flame sensor
cools down the circuit opens?
No
Refer to
Pilot Flame Adjustment Procedure
and
adjust flame if necessary. If adjustment is not
required or unsuccessful, replace defective pilot
flame sensor.
17.
Yes
Go to step # 19.
Look through peep hole- Is a spark being
generated?
No
Go to step # 18.
18. Is the spark gap 1/8" ± 1/32"?
Yes
Replace defective pilot re-light
No
Adjust spark gap.
19.
Yes
If burners now fail to ignite, go to step #21.
Turn power on/off switch to "off" for 5 minutes.
This wit! zero the cycling pilot safety timer. Then
turn unit back on. Is a pilot flame now available? No
Go to step # 20.
20. Measure continuity across pilot flame sensor's
pins #3 and #4. Is it a closed circuit?
Yes
Replace either defective cycling pilot safety timer or
gas control valve. (Note: Gas control valve would
be the more reliable component)
No
Replace defective pilot flame sensor.
21.
Yes
Replace defective gas control valve.
After pilot has been lit and just as pilot goes out
due to cycling pilot safety timer, pull pilot flame
sensor's connection off and quickly measure
continuity between pins #2 and #4. Is it a closed
circuit at first and after pilot flame sensor cools
down the circuit opens?
No
Refer to
Pilot Flame Adjustment Procedure
and
adjust flame if necessary. If adjustment is not
required or unsuccessful, replace defective pilot
flame sensor.
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