SERVICE AND TECHNICAL SUPPORT MANUAL
Gas Furnace: (F/G)9MAE
Specifications subject to change without notice.
32
440 04 4700 00
Figure 16 (CONT.) Troubleshooting Guide
−
Flow Chart
1
+
2
B
L
O
W
E
RO
NA
F
T
E
R
P
O
W
E
RU
P–
(1
15
V
O
R
2
4
V
)
–
N
o
rm
a
l
op
er
a
ti
o
n
.
B
low
er
ru
ns
fo
r
9
0
s
ec
on
ds,
if
u
ni
t
is
po
w
e
re
d
u
p
duri
n
g
a
c
a
ll
fo
r
h
ea
t
(R
-
W
/W
1
cl
osed)
o
r
w
he
n
(R
-W
/W
1
opens
)
duri
ng
the
b
lo
w
e
r
o
n-
del
a
y
p
eri
o
d.
6
+
1
IG
N
IT
IO
N
L
O
C
K
O
U
T
–
S
ys
te
m
fai
le
d
to
igni
te
gas
a
n
d
p
rov
e
flam
e
in
4
attem
p
ts.
C
on
tr
ol
w
ill
aut
o
-r
ese
t
a
fte
r
3
ho
urs
.
R
e
fe
r
to
statu
s
co
de
#6
.
5
ABNO
R
M
A
L
F
L
A
M
E
-P
RO
V
IN
G
S
IG
N
AL
F
la
m
e
is
p
ro
v
e
d
w
h
ile
g
a
s
v
a
lv
e
is
d
e
-
ene
rgi
z
ed.
Indu
cer
w
ill
ru
n
unti
l
fa
ul
t
is
cl
ear
e
d
.
C
heck
fo
r:
-
S
tuck
ope
n
o
r
leak
y
ga
s
v
al
ve.
2
P
RESSURE
S
W
IT
CH
DI
D
N
OT
OPEN
–
C
heck
fo
r:
-
O
bst
ruct
e
d
p
re
ss
ur
e
tu
be.
-
P
re
ss
ur
e
s
w
itc
h
s
tu
ck
close
d
.
3
L
O
W
PRESSURE
S
W
IT
CH
DI
D
N
OT
CL
O
S
E
O
R
R
EO
PENED
–
If
o
p
e
n
s
d
u
ri
n
g
bl
o
w
e
r
on-
d
el
a
y
p
e
ri
od,
bl
o
w
er
w
ill
c
o
m
e
on
fo
r
the
sel
e
ct
ed
bl
o
w
er
off
-del
a
y
.
If
ope
ns
w
it
h
in
5
m
in
utes
af
ter
igni
ti
on
th
e
n
e
x
t
h
e
a
tin
g
c
y
c
le
w
ill
b
e
re
str
ic
te
d
to
ma
x
imu
m-h
ea
t.
C
h
ec
k
fo
r:
-P
ro
p
e
r
v
e
n
t
s
iz
in
g
.
-
A
ir
leak
b
e
tw
e
e
n
v
esti
bul
e
a
nd
bl
o
w
er
com
p
a
rtm
ent
.
-
L
ow
in
le
t
g
as
pr
e
s
su
re
(i
f
L
G
P
S
u
se
d
).
-
R
estri
c
te
d
v
e
n
t.
-
D
iscon
n
ec
ted
o
r
o
bstr
uct
e
d
p
re
ssu
re
tubi
ng.
-
D
e
fe
c
ti
v
e
o
r
mi
sw
ir
ed
pr
e
s
su
re
sw
it
c
hes
-
E
x
c
essi
v
e
w
in
d
.
If
p
ro
bl
em
p
e
rsi
s
ts
tu
rn
s
e
tu
ps
w
it
c
hS
W
1
-3
O
N
to
b
o
o
s
t
induc
er
sp
eed
-
P
lugg
ed
c
o
n
d
e
n
sa
te
drai
n.
-
W
ater
in
ven
t
pi
pi
n
g
,
p
ossi
bl
e
s
ag
gi
n
g
pi
pe
.
4
L
IM
IT
C
IR
C
U
IT
F
A
U
L
T
–
In
d
ic
a
te
s
th
e
lim
it
o
r
a
fla
m
e
ro
ll
o
u
t
s
w
itc
h
is
o
p
e
n
o
r
th
e
fur
nac
e
is
ope
ra
ti
ng
in
m
a
x
im
u
m
-h
e
a
t
o
nl
y
m
o
d
e
d
u
e
to
2
s
u
cc
e
ssiv
e
lim
it
tr
ip
s
w
h
ile
ope
rati
ng
at
an
y
ra
te
<
7
1
%
o
f
max
imum
ra
te
.
B
lo
we
r
w
ill
ru
n
fo
r
4
m
in
.
o
r
u
n
til
ope
n
s
w
it
c
h
rem
ak
es
w
h
ic
h
e
ve
r
is
lon
g
e
r.
If
op
e
n
lo
ng
er
th
an
3
m
in
.,
co
de
c
h
a
nge
s
to
lo
ck
o
u
t
#
7
.
If
o
p
e
n
le
ss
th
a
n
3
m
in
.
statu
s
co
de
#4
co
nti
n
ues
to
fl
a
s
h
u
n
ti
l
b
lo
w
e
r
s
h
u
ts
o
ff
.
F
la
m
e
ro
ll
o
u
t
s
w
itc
h
req
u
ir
es
m
a
n
u
al
re
set.
C
h
eck
for
:
-
L
oo
se
bl
o
w
er
w
h
e
e
l.
-
D
efec
tive
s
w
itch
o
r
co
nn
ectio
n
s.
-
Impr
o
p
e
r
mi
n
imu
m-
or
max
imu
m-h
ea
t
gas
in
p
u
t
a
dj
us
tm
ent
.
-
Im
p
ro
p
e
r
lim
it
s
w
itc
h
o
r
n
o
lim
it
g
a
sk
e
t.
-
D
ir
ty
filt
er
or
re
str
ic
te
d
d
u
ct
s
y
stem
.
T
o
det
e
rm
in
e
w
h
e
ther
th
e
p
ro
bl
em
is
in
the
g
a
s
valve,
igni
ter
,
o
r
fl
am
e
s
e
n
s
o
r
the
s
y
st
e
m
can
b
e
ope
rat
ed
in
c
o
m
p
o
n
e
n
t
test
m
o
d
e.
T
o
check
th
e
ig
ni
te
r
rem
ov
e
th
e
R
th
e
rm
ost
a
t
c
on
nec
ti
o
n
from
the
c
on
trol
,
rese
t
p
o
w
e
r,
a
nd
pu
t
s
e
tu
p
sw
it
ch
S
W
1-6
in
the
ON
posi
ti
o
n
to
s
ta
rt
th
e
com
p
o
n
en
t
test.
D
o
es
th
e
igni
te
r
g
lo
w
o
ran
ge
/w
h
it
e
by
th
e
e
nd
of
th
e
1
5
s
e
c
on
d
w
a
rm-
up
peri
o
d
?
U
n
pl
u
g
ig
ni
te
r
har
ne
ss
fr
om
co
nt
rol
a
nd
rep
eat
com
p
on
ent
tes
t
b
y
tu
rni
n
g
s
etu
p
sw
it
ch
S
W
1-6
O
FF
a
n
d
the
n
b
ack
O
N
.
C
h
eck
fo
r
1
1
5V
bet
w
e
e
n
pi
n
3
a
n
d
N
E
U
T
R
A
L-L
2
o
n
th
e
c
ont
rol
.
W
as
115
V
pres
en
t
fo
r
th
e
1
5
s
ec
on
d
p
eri
o
d?
C
heck
c
o
n
n
e
cti
o
ns
and
retr
y
.
If
cu
rr
ent
is
n
ear
ty
p
ic
al
v
a
lu
e
(4.
0
-6
.0
nom
in
al
)
a
n
d
b
u
rn
er
s
w
ill
not
s
ta
y
o
n,
re
p
e
at
ch
eck
in
max
imu
m-
he
a
t.
If
b
u
rne
rs
w
ill
s
till
n
o
t
s
ta
y
o
n
re
p
la
c
e
cont
rol
.
If
bu
rn
ers
o
p
e
ra
te
in
ma
x
imu
m-h
ea
t
th
e
n
s
w
it
c
h
to
interm
edia
te-
h
e
a
t,
che
c
k
ma
n
if
o
ld
pr
e
s
s
u
re
.
If
O
K
,
c
h
e
c
k
b
ur
ne
r
c
a
rry
ov
er
an
d
fl
am
e
s
e
n
s
o
r
locati
on.
C
lean
fl
am
e
s
e
n
so
r
w
it
h
fi
n
e
s
teel
w
ool
and
re
c
he
ck
curr
en
t.
N
o
m
inal
c
ur
re
nt
is
4
.0t
o6
.0
m
ic
ro
a
m
p
s
.
Is
cu
rre
nt
ne
ar
ty
pi
c
a
l
v
al
ue
?
R
epl
a
c
e
e
le
ct
ro
de.
W
ill
m
a
in
bur
ner
s
ig
ni
te
an
d
s
ta
y
o
n
?
R
epl
a
c
e
fur
nac
e
c
ont
rol
.
Fi
x
e
d.
NO
YE
S
YE
S
YE
S
NO
NO
1
+
5
B
LO
W
E
R
M
OT
OR
LOCK
OUT
–
In
d
ica
te
s
the
b
low
er
fa
ile
d
to
rea
ch
25
0
R
P
M
o
r
the
bl
o
w
er
fa
ile
d
to
com
m
u
nicat
e
w
it
h
in
30
sec
o
n
d
s
a
fte
r
b
e
in
gt
u
rn
e
d
O
N
int
w
o
s
u
c
c
e
s
s
iv
e
h
e
a
t
c
y
cl
es.
C
o
n
tr
ol
w
ill
aut
o-
res
e
t
a
fte
r
3
h
o
u
rs
.
R
e
fe
r
tos
ta
tu
sc
o
d
e#
4+
1
.
R
epl
a
c
e
fur
nac
e
c
ont
rol
.
C
heck
fo
r
co
nti
nui
ty
in
th
e
har
n
es
s
a
nd
igni
te
r.
R
e
pl
ac
e
def
e
cti
v
e
c
om
p
o
n
e
nt
.
R
e
co
nn
ect
the
R
th
e
rm
os
tat
lea
d
a
nd
s
e
t
th
er
mo
s
tat
to
c
a
ll
fo
r
h
e
a
t.
C
on
ne
c
t
vol
tm
e
te
r
a
cr
oss
gas
val
v
e
B
LU
E
a
n
d
G
R
EEN/
Y
EL
L
O
W
w
ir
e
s
.
D
o
e
s
g
a
s
v
a
lv
e
re
cei
v
e
2
4V
?
D
o
es
gas
v
al
v
e
ope
n
a
n
d
a
llo
w
g
as
to
flo
w
?
D
o
th
em
a
inb
u
rn
e
rs
ig
n
it
e
?
D
o
th
em
a
inb
u
rn
e
rs
s
ta
y
o
n
?
Allo
w
u
n
it
to
d
ro
p
to
m
in
-h
e
a
t,
and
c
h
e
ck
m
a
nifol
d
p
res
sur
e
.
R
epe
at
test
to
che
c
k
for
in
te
rm
itt
e
n
t
o
p
e
ra
ti
o
n
.
C
heck
th
a
t
a
ll
g
a
s
v
al
ves
a
re
tur
n
ed
o
n
.
R
epl
ace
v
al
v
e
.
C
h
e
c
k
c
on
ne
c
ti
o
n
s
.
If
O
K
,
repl
ace
c
o
n
tr
ol
.
C
heck
fo
r:
-
Ina
deq
u
a
te
fl
a
m
e
c
a
rr
y
ov
er
or
rou
g
h
igni
ti
on
.
-
L
ow
in
le
t
g
as
pr
e
s
su
re
.
-
P
ro
p
e
r
fir
in
g
ra
te
.
-
A
ir
le
a
k
a
g
e
a
ro
u
n
d
ig
n
ite
r
brack
e
t.
R
e
pe
at
c
a
ll
fo
r
h
e
a
t
a
nd
ch
eck
fl
a
m
e
sens
or
c
u
rr
e
n
t
duri
n
g
tri
al
fo
r
ig
n
it
io
n
peri
od.
Is
the
D
C
m
icr
oam
ps
bel
o
w
0
.5
?
YE
S
YE
S
YE
S
YE
S
YE
S
NO
NO
NO
NO
NO
NO
YE
S
6
IGN
IT
IO
N
P
ROV
IN
G
F
A
IL
URE
–
If
fla
m
e
is
n
o
t
se
ns
e
d
du
ri
ng
th
e
tr
ia
l
fo
r
ign
it
io
n
peri
od,
th
e
c
ont
rol
w
ill
re
pe
at
th
e
igni
ti
o
n
seq
u
en
ce
3
m
or
e
ti
m
es
be
fo
re
lo
ck
out
#
6
+
1
o
cc
urs
.
If
fl
am
e
s
ig
nal
is
lost
d
u
ri
n
g
the
bl
o
w
e
r
on-
d
el
a
y
p
e
ri
od,
bl
o
w
er
w
ill
c
o
m
e
o
n
for
the
sel
e
cte
d
bl
o
w
er
off-
del
a
y
.
C
h
e
c
k
the
fol
lo
w
ing
be
for
e
goi
n
g
to
the
ne
xt
st
ep.
-
G
a
s
va
lv
e
tur
ne
d
o
ff
.
-
M
an
ual
s
h
u
t-
off
v
al
ve
.
-
G
REEN/
Y
EL
L
O
W
w
ir
e
M
UST
b
e
con
n
ect
e
d
to
fur
nac
e
s
he
et
m
e
ta
l.
-
F
la
me
s
e
ns
o
r
mu
s
t
n
o
t
b
e
g
ro
un
de
d
.
2
+
5
INVA
L
ID
M
O
DE
L
SEL
ECT
IO
N
O
R
SET
UP
ERROR
–
If
st
a
tu
s
co
d
e
2
+
5
onl
y
fl
a
sh
es
4
ti
m
es
on
p
o
w
e
r-u
p
the
cont
rol
is
m
issi
ng
it
s
m
o
del
pl
u
g
P
L
4
and
is
d
e
fa
ul
ti
n
g
to
th
e
m
o
d
el
sel
e
cti
o
n
stor
ed
in
m
e
m
o
ry
.
If
s
ta
tu
s
c
o
d
e
2
+
5
fl
ash
e
s
c
onti
nu
ousl
y
it
c
oul
d
indi
c
at
e
an
y
o
f
the
fol
lo
w
ing
:
-
M
o
d
e
l
p
lu
g
P
L
4
is
m
is
s
ing
an
d
the
re
is
n
o
v
a
lid
mo
de
l
s
to
re
d
in
p
e
rma
ne
nt
me
mo
ry
.
T
h
is
w
ill
ha
pp
en
if
y
o
u
for
get
to
in
stal
l
th
e
m
o
d
e
l
p
lu
g
P
L4
on
a
s
er
v
ic
e
re
p
lac
e
m
e
n
t
c
on
tr
o
l.
-
T
herm
o
st
at
c
a
ll
w
it
h
S
W
1-1
O
N
.
-
T
herm
ost
a
t
c
al
l
w
it
h
S
W
1
-6
ON
.
-
S
W
1
-1
an
d
S
W
1
-6
bo
th
ON
.
-
T
w
o
di
ff
er
ent
fur
n
a
c
e
m
o
d
el
s
tw
in
n
ed.
-
S
ervi
c
e
repl
a
c
em
e
n
t
c
ont
rol
is
in
cor
rec
t.
N
e
e
d
m
o
d
u
la
ti
ng
bo
ar
d
w
it
h
s
o
ft
w
a
re
v
e
rs
io
n
V
1
7
o
r
la
ter
.
3
+
5
G
AS
VAL
VE
F
A
U
L
T
–
In
d
ic
a
te
s
th
e
mo
d
u
lat
in
g
g
as
v
a
lv
e
fa
ile
d
to
re
s
po
nd
to
a
c
om
m
a
n
d
fr
om
th
e
fur
nac
e
co
nt
rol
or
po
w
e
r
to
the
gas
val
v
e
e
le
ct
ro
ni
cs
w
a
s
in
ter
ru
pte
d
.
C
he
ck
for:
-
Inte
rm
itte
nt
R
E
D
,
Y
E
LL
O
W
,
o
r
ORA
N
GE
w
ire
at
gas
v
alv
e
o
r
P
L
8
con
necti
ons
.
