Flame failure after 5 tries to restart. 

• No gas pressure.
• Gas pressure under minimum value shown on rating plate.
• Gas line not completely purged of air.
• Defective Electrode.
• Loose burner ground connection.
• Defective Ignition Cable.
• Defective gas valve
(check for 24 VDC at harness during trial for ignition before replacing valve).
• Air-fuel mixture out of adjustment - consult factory.