19
Fan
Mo
to
r
Runs
Igniter
Does
No
t
Spark.
Has
ignition cable
been check
ed f
or
continuity?
R
eplace ignit
or
assembly
.
Ye
s
No
Do
air pr
oving switch
contacts close?
Is
air pr
oving switch
arm binding?
Ye
s
Ye
s
Is f
an wheel clean?
Tight
en the
fan wheel
Is
fan wheel tighened t
o
mo
tor shaf
t?
Ye
s
Check connection and
wires. R
eplace if
necessar
y.
Check high v
oltage ignition
cable f
or resistance and
tight connections. Ohm reading should be 25 K ohm or less. If great
er
than 25 K ohm, replace
the cable.
Check ignit
er gap.
Has
ignit
or assembly
been cleaned?
Clean the fan wheel
No
No
No
No
No
Ye
s
Is
ignit
er electr
ode
pr
operly gapped t
o burner?
Ye
s
Ye
s
Check burner t
op
adjacent t
o ignit
or
electr
ode f
or
corr
osion. Use
emer
y clo
th t
o
remo
ve an
y
corr
osion
No
Ye
s
Is heat
er
recie
ving pr
oper
voltage ?
Det
ermine electrical
req
uirements of heat
er
. Ensure
it matches po
w
er supply
.
Check wiring of po
w
er supply
to heat
er
. Ensure correct
electrical polarity
. Check
gr
ounds t
o heat
er and
gr
ounded com
ponents in
heat
er
.
No
Is
ignition contr
ol
sending out high
voltage?
Det
ermine if ignition contr
ol is
sending high v
oltage.:
--
Clo
se
the
ga
s s
upply
to
the
he
at
er
-- R
emo
ve ignition lead fr
om contr
ol.
--Hold a scre
wdriv
er tip 3 mm. fr
om
male ignition t
erminal on contr
ol
-- T
urn heat
er on.
-- Spark should be seen. If none, replace ignition contr
ol.
No
Check f
or debris.
Clean as needed.
Check switch f
or continuity
.
R
eplace switch if necessar
y.
No
Ha
ve
air pr
oving switch
wires and connections
been check
ed f
or
continuity?
Ye
s
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
Problem
