L.B. White I-40 Infraconic Spark Ignition - Manual (Page 20)

Does Ignit
er Spark?
19
Problem 1 Heater does not light
Is
pr
oper v
oltage
being sent fr
om
ON/OFF switch t
o
high limit
switch?
Is an
audible click
hear
d when solenoid v
alv
e
is supplied
v
oltage?
Check f
or v
oltage
and resistance of
switch and electrical
leads betw
een
switches and ignition
contr
ol. R
eplace if
def
ectiv
e.
Ye
s
No
Ye
s
Inner combustion cone, v
enturi tube
or main burner orif
ice are plugged
with dir
t. Clean the
heat
er
.
No
Is ON/OFF switch
on Heat
er P
ositioned
to
On
P
osition the
switch t
o
On.
Ye
s
No
Is
pr
oper v
oltage
supplied t
o
zone
contr
ol panel and
heat
er po
w
e
r
cor
d?
Pr
o
vide pr
oper v
oltage.
- Check cir
cuit break
er
s
- Mak
e sure building
en
vir
onment contr
ol
thermostat is w
o
rking
pr
operly and calling f
or
heat
Ye
s
No
Ye
s
No
R
eplace gas solenoid
v
alv
e
A
. Check ignit
er f
or
def
ects, cleanliness, and
pr
oper gap.
B. Check ignition lead.
V
erify resistance of lead.
Should be 1 ohm or less. Ensure lead has good connections and no cuts. R
eplace if necessar
y.
C. If ignit
er and ignition lead
are good, R
eplace
inition contr
ol.
Is pr
oper
v
oltage
sent thr
ough po
w
er
cor
d t
o
On/Of
f
switch?
Ye
s
No
Check leads of po
w
er cor
d f
o
r
resistance.
R
eplace po
w
e
r
cor
d if necessar
y.
Is pr
oper
v
oltage supplied t
o
gas contr
ol v
alv
e
on heat
er?
R
eplace ignition
contr
ol.
No
Ye
s
Are all fuel supply
v
alv
es open?
Open all fuel supply v
alv
es
Ye
s
No
Is pr
oper
gas pressure
supplied t
o
zone
contr
ol panel and
to
heat
er?
Ye
s
No
Pr
o
vide Pr
oper
Pressure.