SERVICE AND TECHNICAL SUPPORT MANUAL
Gas Furnace: (F/G)9MVE
Specifications subject to change without notice.
29
440 04 4800 00
Figure 17 (CONT.) Troubleshooting Guide
−
Flow Chart
1
+
2
B
L
O
W
E
RO
NA
F
T
E
R
P
O
W
E
RU
P–
(11
5
V
O
R
24V
)
–
N
o
rm
al
o
p
e
rati
on.
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
hea
t
(R
-
W
/W
1
cl
osed)
o
r
w
he
n
(R
-W
/W
1
opens
)
d
u
ri
n
g
th
e
b
low
er
on
-d
e
la
y
pe
ri
od
.
6
+
1
IG
N
IT
IO
N
L
O
C
K
O
U
T
–
S
ys
te
m
fa
ile
d
to
ig
ni
te
g
a
s
a
nd
pr
ove
fl
a
m
e
in
4
attem
p
ts.
C
on
trol
w
ill
a
u
to
-r
eset
af
ter
3
hou
rs.
R
ef
er
to
s
tat
us
c
o
d
e
#
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
g
a
s
val
v
e.
2
P
RESSURE
S
W
IT
CH
DI
D
N
OT
OPEN
–
Ch
e
c
k
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
-H
EAT
PRESSURE
S
W
IT
CH
DI
D
NO
T
C
L
O
SE
O
R
REO
PENED
–
If
o
p
e
n
s
d
u
ri
n
g
b
lo
we
r
o
n
-d
e
la
y
p
e
rio
d
,
b
lo
w
e
r
w
ill
c
o
me
on
fo
r
th
e
s
e
le
c
ted
b
low
er
o
ff
-d
e
lay
.
If
o
pen
lo
n
g
e
r
th
a
n
5
m
in
ute
s
in
duc
er
shuts
o
ff
fo
r
1
5
m
in
utes
be
fo
re
ret
ry
.
Ch
e
c
k
fo
r:
-
P
rop
e
r
v
en
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
efec
ti
ve
or
m
is
w
ir
e
d
p
ress
u
re
s
w
it
ch
e
s
-
E
x
c
essiv
e
w
in
d
.
-
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
.
-
D
efec
ti
ve
Ind
u
c
e
r
m
ot
or
.
-
L
ow
in
du
c
e
r
v
o
lt
a
ge
(1
15
V
A
C
)
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
o
pe
ra
ti
ng
in
hi
g
h
-h
eat
o
n
ly
m
ode
due
to
2
s
u
cc
essi
v
e
lo
w
-h
eat
lim
it
tr
ip
s.
Blo
w
e
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
as
h
u
nti
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
ual
re
set.
C
h
eck
for
:
-
Loo
se
bl
o
w
er
w
h
e
e
l.
-
D
efec
ti
ve
s
w
it
ch
o
r
co
nn
ecti
o
n
s.
-
Im
p
ro
per
lo
w
-
o
r
hi
gh
-h
eat
gas
inp
ut
adj
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
erm
in
e
w
h
et
her
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
th
e
c
o
n
tr
o
l,
re
s
et
pow
er
,
a
n
d
p
u
t
s
et
up
s
w
it
c
h
S
W
1
-6i
nt
h
e
O
N
p
o
s
it
io
n
tos
ta
rt
th
e
com
p
o
n
en
t
test.
D
o
es
th
e
igni
ter
gl
o
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
od
?
U
n
pl
u
g
ig
ni
te
r
h
ar
ne
ss
fr
om
co
nt
rol
a
nd
rep
e
at
com
p
on
ent
tes
t
b
y
tu
rni
n
g
s
e
tu
p
s
w
it
c
h
S
W
1
-6O
F
F
a
n
dt
h
e
nb
a
c
k
O
N
.
C
h
e
c
k
for
11
5
V
b
e
tw
e
en
p
in
3
an
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
pi
cal
v
al
u
e
(4.
0
-6
.0
nom
in
a
l)
an
d
b
urn
e
rs
w
ill
not
sta
y
o
n
,
rep
eat
ch
eck
in
hi
g
h
-h
e
a
t.
If
bur
ne
rs
w
ill
sti
ll
no
t
s
ta
y
o
n
repl
a
ce
c
o
nt
rol
.
If
bu
rn
ers
o
p
e
ra
te
in
hi
gh
-h
eat
th
en
s
w
it
ch
to
lo
w
-
hea
t,
c
heck
m
ani
fol
d
pres
su
re.
If
O
K
,
c
heck
b
u
rn
er
c
a
rr
y
o
ve
r
a
nd
fl
a
m
e
sens
or
lo
ca
ti
on
.
C
lean
fl
a
m
e
se
nso
r
w
it
h
fi
n
e
st
eel
w
o
ol
and
re
che
c
k
c
urr
e
n
t.
N
om
inal
cur
re
n
t
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
b
u
rn
e
rs
ig
n
ite
a
n
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
R
epl
a
c
e
fur
nac
e
c
ont
rol
.
C
heck
fo
r
co
nti
n
ui
ty
in
th
e
har
n
es
s
a
nd
igni
te
r.
R
e
pl
ac
e
d
e
fe
c
ti
v
e
c
o
m
po
ne
n
t.
R
e
co
nn
ect
the
R
th
e
rm
os
tat
lea
d
a
nd
s
e
t
the
rm
o
sta
t
to
call
for
h
eat.
C
o
n
n
e
ct
voltm
e
te
r
a
cr
oss
gas
valv
e
c
o
n
n
e
cti
ons
.
D
o
es
gas
val
v
e
rec
ei
ve
24V
?
D
o
es
gas
val
v
e
ope
n
a
nd
al
lo
w
g
as
to
flo
w
?
D
o
th
e
m
ai
n
b
ur
ner
s
ig
ni
te
?
D
o
th
e
m
ai
n
b
ur
ner
s
st
a
y
o
n
?
Allo
w
b
lo
we
r
to
c
o
m
e
o
n
a
n
d
rep
e
at
tes
t
to
ch
eck
for
in
te
rm
it
te
nt
op
er
a
ti
o
n
.
C
h
e
c
k
tha
t
a
ll
ga
s
v
a
lv
e
s
a
re
tur
ned
o
n
.
R
epl
a
ce
val
v
e.
C
heck
c
o
n
n
e
cti
o
ns.
If
O
K
,
repl
ace
c
o
n
tr
ol
.
C
heck
fo
r:
-
Ina
deq
ua
te
fl
am
e
c
ar
ry
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
.
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
d
uri
n
g
tri
al
fo
r
ig
n
it
io
n
peri
od.
Is
the
D
C
m
ic
ro
am
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
uen
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
lo
st
du
ri
n
g
th
e
bl
o
w
e
r
on-
del
a
y
p
eri
o
d,
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
nect
e
d
to
fur
nac
e
s
h
e
e
t
m
et
al
.
-
F
la
m
e
s
e
n
s
or
m
u
st
not
be
gr
ou
nd
ed.
2
+
5
INVA
L
ID
M
O
DE
L
SEL
ECT
IO
N
O
R
SE
TUP
E
RRO
R
–
If
s
ta
tu
s
c
o
d
e
2
+
5
onl
y
fl
ash
e
s
4
ti
m
e
s
o
n
p
o
w
e
r-u
p
the
c
o
nt
rol
is
m
issi
ng
it
s
m
od
el
pl
ug
P
L
4
and
is
d
efa
u
lt
in
g
to
the
m
o
del
s
el
e
c
ti
o
n
stor
ed
in
m
e
m
o
ry
.
If
s
ta
tu
s
c
ode
2
+
5
fl
a
s
h
es
co
nti
n
uo
usl
y
it
co
ul
d
indi
c
ate
a
n
y
of
th
e
fol
lo
w
ing
:
-
M
od
el
pl
ug
P
L
4
is
m
issi
n
g
a
n
d
th
e
re
is
no
v
a
lid
m
o
del
s
to
re
d
in
p
e
rm
an
en
t
m
e
m
ory
.
Th
is
w
ill
ha
pp
en
if
y
o
u
for
g
e
t
to
in
s
ta
ll
th
e
m
od
e
l
pl
ug
P
L
4
o
n
a
s
e
rvi
c
e
re
p
la
c
e
m
ent
co
n
trol
.
-
T
herm
o
st
at
c
a
ll
w
it
h
S
W
1-1
O
N
.
-
T
herm
o
st
at
c
a
ll
w
it
h
S
W
1-6
O
N
.
-
S
W
1
-1
an
d
S
W
1
-6
bo
th
ON
.
-
T
w
o
di
ff
er
ent
fur
na
ce
m
o
del
s
tw
in
ne
d.
-
S
ervi
c
e
repl
a
c
em
e
n
t
c
ont
rol
is
in
c
o
rr
ect
.
N
e
ed
no
n-m
o
dul
a
ti
n
g
b
oar
d
w
it
h
s
o
ft
w
a
re
v
e
rs
io
n
V
1
7
o
r
la
te
r.
9
H
IG
H-
HEAT
PRESSURE
S
W
IT
CH
O
R
REL
A
Y
D
ID
N
O
T
C
L
O
SE
OR
REO
PENED
-
C
h
e
c
k
fo
r:
-
C
ont
rol
rel
a
y
m
a
y
be
de
fecti
v
e.
-
G
a
s
v
a
lve
is
m
is
w
ir
e
d
.
-
R
efe
r
to
st
atus
co
de
#3.
10
P
O
LA
R
IT
Y
–
C
he
ck
for
c
or
rec
t
lin
e
vo
lta
g
e
p
o
la
rit
y
.
If
u
n
its
a
re
tw
in
n
e
d
,
c
h
e
c
k
for
pr
op
er
lo
w
-v
o
lt
a
g
e
(2
4
V
)
tr
an
s
for
me
r
p
ha
s
ing
.
7
L
IM
IT
C
IRCU
IT
L
O
CKOUT
–
L
o
ck
o
u
t
o
ccu
rs
if
th
e
lim
it
o
r
fla
m
e
ro
ll
o
u
t
s
w
itc
h
is
ope
n
lo
n
g
e
r
tha
n
3
m
inut
es
or
10
succe
ssive
lim
it
tr
ip
s
o
c
c
ur
re
d
d
ur
in
g
h
ig
h-
hea
t.
C
o
nt
rol
w
ill
a
u
to
-re
set
a
ft
er
3
h
ou
rs.
Refe
r
to
s
ta
tus
c
o
d
e
#4.
8
G
AS
HEATI
N
G
L
O
C
KO
UT
–
C
o
n
tr
o
l
w
ill
N
O
T
a
ut
o
res
et.
T
u
rn
o
ff
p
o
w
e
r
a
nd
w
a
it
5
m
inut
es
to
re
tr
y
.
C
h
eck
for:
-
S
tuck
close
d
g
a
s
v
alve
re
la
y
o
n
c
on
tr
ol.
-
M
is
w
ir
e
o
r
s
hor
t
to
g
as
v
a
lv
e
w
ir
e
.
