Vanguard Heating VN6A - Manual (Page 17)

17
TROUBLE-
SHOOTING
POSSIBLE
CAUSE
1. Ignitor electrode posi-
tioned wrong
2. Ignitor electrode broken
3. Ignitor electrode not con-
nected to ignitor cable
4. Ignitor cable pinched or
wet
5. Broken ignitor cable
6. Bad piezo ignitor
1. Gas supply turned off or
manual shutoff valve
closed
2. Control knob not pressed
in while being turned to
PILOT/IGN position
3. Air in gas lines when in-
stalled
4. ODS/pilot is clogged
5. Gas regulator setting is
not correct
REMEDY
1. Replace ignitor
2. Replace ignitor
3. Reconnect ignitor cable
4. Free ignitor cable if
pinched by any metal or
tubing. Keep ignitor cable
dry
5. Replace ignitor cable
6. Replace control valve (pi-
ezo is part of control
valve)
1. Turn on gas supply or
open manual shutoff
valve
2. Press in control knob
while turning to PILOT/
IGN position
3. Continue holding down
control knob. Repeat ig-
niting operation until air
is removed
4. Clean ODS/pilot (see
C L E A N I N G A N D
MAINTENANCE, page
16) or replace ODS/pilot
assembly
5. Replace gas regulator
OBSERVED
PROBLEM
When control knob is
pressed in and turned
to the PILOT/IGN po-
sition, there is no
spark at ODS/pilot
When control knob is
pressed in and turned
to the PILOT/IGN po-
sition, there is spark at
ODS/pilot but no igni-
tion
Note: All troubleshooting
items are listed in order of
operation.
!
WARNING ICON G 001
WARNING
Turn off heater and let cool before servicing. Only a qualified
service person should service and repair heater.
!
WARNING ICON G 001
CAUTION
Never use a wire, needle, or similar object to clean ODS/pilot. This
can damage ODS/pilot unit.