Vanguard VGN30 Owner's Operation And Installation Manual page 18

18
OBSERVED
PROBLEM
When ignitor button is
pressed, there is spark
at ODS/pilot but no
ignition
ODS/pilot lights but
flame goes out when
control knob is
released
Burner does not light
after ODS/pilot is lit
POSSIBLE
CAUSE
1. Gas supply turned off or
manual shutoff valve
closed
2. Control knob not in PI-
LOT position
3. Control knob not
pressed in while in PI-
LOT position
4. Air in gas lines when
installed
5. ODS/pilot is clogged
6. Gas regulator setting is
not correct
1. Control knob not fully
pressed in
2. Control knob not
pressed in long enough
3. Manual shutoff valve
not fully open
4. Thermocouple connec-
tion loose at control
valve
5. Pilot flame not touching
thermocouple, which
allows thermocouple to
cool, causing pilot
flame to go out. This
problem could be
caused by one or both of
the following:
A) Low gas pressure
B) Dirty or partially
clogged ODS/pilot
6. Thermocouple dam-
aged
7. Control valve damaged
1. Burner orifice
clogged
Continued
REMEDY
1. Turn on gas supply or
open manual shutoff
valve
2. Turn control knob to PI-
LOT position
3. Press in control knob
while in PILOT position
4. Continue holding down
control knob. Repeat ig-
niting operation until air
is removed
5. Clean ODS/pilot (see
CLEANING
M A I N T E N A N C E ,
page 17) or replace
ODS/pilot assembly
6. Replace gas regulator
1. Press in control knob
fully
2. After ODS/pilot lights,
keep control knob
pressed in 30 seconds
3. Fully open manual shut-
off valve
4. Hand tighten until snug,
then tighten 1/4 turn
more
5. A) Contact local natural
gas company
B) Clean ODS/pilot (see
CLEANING
M A I N T E N A N C E ,
page 17) or replace
ODS/pilot assembly
6. Replace thermocouple
7. Replace control valve
is 1. Clean burner
CLEANING
M A I N T E N A N C E ,
page 17) or replace
burner orifice
Continued
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(see
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