L.B. White 170 Dual Fuel - Manual (Page 24)

24
All lights are on, but burner does not light..
Is fuel supply v
alv
e open?
Ye
s
Ye
s
Open fuel supply v
alv
es t
o
heat
er
No
Is ignit
or
pr
operly
gapped?
Check iIgnit
er gap
and regap t
o
specif
ications.
No
Ye
s
Does Ignit
or
Spark?
Is ignit
er
high v
oltage lead
connect
ed?
No No
Connect High V
oltage
Lead
Has
ignition cable
been check
ed f
o
r
continuity?
R
eplace ignit
or
assembly
.
Ye
s
No
Check high v
oltage ignition
cable f
or resistance and tight
connections. Ohm reading should be about 9 K ohm.
If no continuuity is read,
replace cable.
Has
ignit
or assembly
been cleaned?
No
Check burner t
op adjacent
to
ignit
or electr
ode f
o
r
corr
osion. Use emer
y clo
th
to
remo
v
e
an
y corr
osion
Is
ignition contr
ol
sending out high
v
oltage?
Det
ermine if ignition contr
ol is
sending high v
oltage:
--
R
emo
v
e
ignition lead fr
om contr
ol.
--
Hold a scre
wdriv
er tip about 1/8
to
3/1
6 in. fr
om male ignition
terminal on contr
ol
--
Turn heat
er on.
--
Spark should be seen. If none, replace ignition contr
ol.
No
Ensure lead is
connect
ed at bo
th
com
ponents
No
Is
ignition lead
securely connect
ed t
o
ignition contr
ol and
ignit
er?
Is
ignit
or insulat
or
crack
ed?
Ye
s
No
Clean the ignit
or electr
ode.
Use emer
y clo
th.
Ye
s
Ye
s
Ye
s
Ye
s
No
Is
gas contr
ol
v
alv
e set t
o
ON
position?
Set the contr
ol
v
alv
e t
o
ON.
No
Is gas
contr
ol v
alv
e
receiving pr
oper inlet
gas supply pressure?
Check inlet pressure.
Pr
o
vide pr
oper inlet
pressure. R
e
fer t
o
heat
er’s dataplat
e.
Ye
s
Plugged burner or burner orif
ice. Clean
these com
ponents.
Is gas
contr
ol v
alv
e set t
o
pr
oper outlet
pressure?
Ye
s
No
A
.
Check ouitlet pressure. Pr
o
vide
pr
oper outlet pressure. R
e
fer t
o
heat
er’s dataplat
e.
B.
If no pressure, the contr
ol v
alv
e is
def
ectiv
e. R
eplace contr
ol v
alv
e.
Ye
s