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i. Troubleshooting Flow Chart - Quick Reference...
Second Visual Check
Spark Present But Main Burner Does Not Come On*
Is main valve wiring securely
attached to terminal M.V.3
and ground?
No Yes
Is 24 VAC present
between terminals M.V.3
and ground ?
No Yes
Check for continuity in
wiring from M.V.3 to gas
valve, and gas valve to GR.
No Yes
Is inlet gas pressure per
manufacturer’s specifications?
No Yes
Is Spark gap .125 in.
and in gas stream?
No Yes
Correct
Replace
Johnson Control
module G760/761
Correct
Correct
Determine
why continuity
does not exist.
Replace
gas valve.