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e. Troubleshooting Flowchart - 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
Correct
Replace
Johnson Control
module G760/761
Check for continuity in
wiring from M.V.3 to gas
valve, and gas valve to GR.
NO YES
Is Spark gap 0.1 in.
and in gas stream?
NO YES
Replace
gas valve.
Correct
Correct
Determine
why continuity
does not exist.
Is inlet gas pressure per
manufacturer’s specifications?
NO YES