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20008845
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Troubleshooting
Honeywell Valve (UVLX-R series)
• Supply line hooked up
• Shutoff valve open
• Lockout has engaged. Wait 60 seconds
and try again
• Piezo screws are tight for good ground
• 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 minimum of 325mV
• All wiring connections
• Replace thermopile
• Thermocouple needs a minimum of 14mV
• Defective valve. turn to pilot, meter should
read greater than 100mV. If not, replace the
valve.
• Valve turned on
• Wall switch is not turned on
• Thermopile needs a minimum of 325mV
• Plugged burner
Gas supply on
Pilot lights with Piezo
Pilot stays lit
Pilot lights main
burner
System OK
YES
START
CHECK
NO
NO
NO
NO
YES
YES
YES