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 |
|
|
Correct
Replace
Johnson Control module G760/761
Determine why continuity does not exist.
Correct
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 | |
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|
|
|
|
|
Correct
Is Spark gap .125 in. and in gas stream?
No | Yes | |
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|
|
|
|
|
Replace gas valve.
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