360 DVS Series Direct Vent Fireplaces
Troubleshooting – Honeywell VS8421
START
Gas Supply On
YES
Pilot Lights With Piezo Ignitor
YES
PILOT STAYS LIT
YES
PILOT LIGHTS MAIN BURNER
YES
SYSTEM OK
NO
NO
NO
NO
CHECK
•Supply Line Hooked Up
•Shutoff 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
•Valve Is Turned On
•Wall Switch Is Not Turned On. Watch For Grounded Wires!
•Thermopile Needs A Min. 325mv.
•Plugged Burner Orifice
•Defective Valve. Turn To Pilot, Meter Should Read Greater Than 100mv. If Not, Replace.
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