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START
Gas Supply On
YES
Pilot Lights With Piezo
Ignitor
YES
Pilot Stays Lit
YES
Pilot Lights Main Burner
YES
System Ok
20003565
Vermont Castings Majestic Products NV360/580 Series
Troubleshooting
Honeywell VS8421
Remove glass door before service work
NO
NO
NO
NO
CHECK
•
Supply Line Hooked Up
•
Shut off Valve Open
•
Lockout Has Engaged. Wait 60
Seconds And Try Again.
•
For Spark At Electrode While
Depressing Piezo
1/8" Gap To Pilot Hood Needed.
•
All Wiring Connections
•
Replace Piezo Ignitor
•
For Air In The Lines
•
Thermopile Needs A Min.
325mv. Adjust Pilot Flame
Height.
•
All Wiring Connections
•
Replace Thermopile
•
Thermocouple Needs A Min. Of
14mv
•
Defective Valve. Turn To Pilot,
Meter Should Read Greater
Than 100mv. If Not, Replace.
•
Valve Is Turned On
•
Wall Switch Is Not Turned On.
Watch For Grounded Wires!
•
Thermopile Needs A Min. 325mv.
•
Plugged Burner Orifice
15
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