i. 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 |
Secure wiring to
M.V.(3) and ground.
Replace
DSI module
Determine why continuity does not exist.
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 |
Set gas pressure
Natural 3.5 inches W.C. (8.7 mb) 
L.P. 10.5 inches W.C. (26.1 mb)
Is inlet gas pressure per
manufacturer's specifications?
No | Yes |
Correctly adjust the gap and position of spark ignitor.
Is spark gap .125 in.(3.175 mm)
and in gas stream?
No | Yes |
Replace gas valve.
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