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UVS33/36 Vent-Free Heaters
20002211
Troubleshooting
• Gas Supply On
• Supply line hooked up
• Shutoff valve open
NO
NO
NO
NO
• 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 lines
• Thermopile needs a minimum
325mV. Adjust pilot flame height
• 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
Pilot Lights with
Piezo Ignitor
YES
YES
YES
YES
Pilot Stays Lit
Pilot Lights Main
Burner
System OK
START
CHECK
• Valve is turned on
• Wall switch is not turned on.
Watch for grounded wires!
• Thermopile needs a minimum
325mV.
• Plugged burner orifice
FP396A
UVHB-standing pilot troubleshooting
7/2/98
Honeywell