SERVICE AND TECHNICAL SUPPORT MANUAL
Gas Furnace: (F/G)9MVE
Specifications subject to change without notice.
440 04 4800 00
28
Figure 17
Troubleshooting Guide
−
Flow Chart
Is
A
M
BER
L
E
D
s
ta
tu
s
lig
h
t
O
N
so
li
d
,
al
ter
n
a
tel
y
fl
a
s
h
in
g
b
ri
gh
t-di
m
-b
ri
ght
-di
m
lik
e
a
he
art
b
e
a
t,
or
fl
as
hi
ng
ON
an
d
OF
F
?
Is
th
e
re
2
4
V
a
t
SEC-
1
a
n
d
SEC
-2
?
Is
th
er
e
1
15V
at
L1
an
d
L
2?
Is
th
e
2
4V
fu
se
op
en
?
Is
do
or
s
w
it
c
h
cl
o
s
ed
?
R
e
pl
a
c
e
tra
ns
fo
rm
er
.
R
e
p
lac
e
d
oo
r
s
w
it
c
h.
Is
th
e
re1
1
5
V
g
o
in
gt
os
w
it
c
h
?
C
lose
the
d
o
or
s
w
it
c
h
.
Is
ci
rc
ui
t
b
re
ak
er
cl
ose
d
?
C
heck
fo
r
co
nti
nui
ty
in
w
ire
from
ci
rcui
t
bre
a
k
e
r
to
furn
a
ce
.
C
lose
c
ir
c
u
it
b
re
a
k
e
r
a
nd
go
ba
ck
to
START.
Is
A
M
B
E
R
LE
D
s
ta
tu
s
lig
ht
al
te
rna
tel
y
fl
ashi
ng
bri
g
ht
-di
m
-b
ri
g
h
t-
di
m
lik
e
a
h
e
a
rt
be
at
?
Dete
rm
ine
s
tat
u
s
c
od
e.
T
h
e
s
ta
tu
s
c
o
d
e
is
a
s
in
gl
e
o
r
tw
o
di
gi
t
n
um
be
r
w
it
h
the
fi
rst
n
um
b
e
r
det
erm
in
e
d
b
y
the
num
b
er
of
shor
t
fl
a
sh
es
a
n
d
th
e
se
con
d
num
be
r
afte
r
the
pl
us
(+
)
s
ig
n
is
the
num
b
e
r
o
f
long
fl
as
hes
?
T
h
e
las
t
s
ta
tus
c
o
d
e
h
as
cl
e
a
re
d.
T
o
re
call
a
p
re
vio
u
s
s
ta
tu
s
c
o
d
e
d
isc
o
n
n
ec
t
the
R
th
erm
o
s
tat
co
nne
cti
o
n,
re
s
e
t
po
w
e
r,
an
d
p
ut
s
e
tu
p
s
w
itch
S
W
1
-1
in
the
O
N
p
osi
ti
on.
T
h
e
A
MB
E
R
LE
D
w
ill
fl
ash
th
e
st
atus
co
des
in
the
or
de
r
o
f
occu
rr
enc
e
.
R
eco
rd
s
ta
tus
c
od
es
unti
l
hea
rtb
ea
t
fl
a
she
s
.
A
ft
er
he
ar
tbe
a
t
fl
ash
e
s
s
eve
ral
ti
m
e
s
the
s
tat
us
c
o
d
e
s
w
ill
re
pea
t.
S
tatu
s
co
de
s
a
re
er
ase
d
afte
r
7
2
h
ou
rs
or
c
a
n
b
e
m
an
ual
ly
er
as
ed
b
y
p
u
tti
ng
s
e
tu
p
s
w
itch
S
W
1
-1
in
th
e
O
N
posi
ti
on
an
d
jum
p
e
ri
ng
R
,
W
/W
1
,
a
nd
Y
/Y
2
s
imu
lt
an
eo
u
s
ly
un
ti
l
th
e
h
e
a
rtb
ea
t
fl
ash
e
s.
W
hen
don
e
put
set
u
p
s
w
itch
S
W
1-1
in
the
OF
F
posi
ti
o
n
.
W
a
s
there
a
p
rev
ious
s
tat
u
s
c
od
e
o
th
er
th
an
th
e
h
e
a
rt
be
at
?
Go
to
s
e
cti
o
n
b
el
o
w
fo
r
the
s
tat
us
c
o
d
e
that
w
a
s
flas
h
e
d
.
D
o
es
the
c
o
n
tr
ol
re
sp
on
d
to
W
/W
1,
W
2
,
Y
1
,
Y
/Y
2,
a
n
d
G
(2
4V
)
therm
o
s
tat
signal
s?
R
u
n
s
y
s
tem
thr
ou
gh
a
lo
w
-h
eat
,
hi
gh
-
h
e
a
t,
o
r
c
o
o
lin
g
c
y
c
le
to
c
h
e
c
k
o
p
e
ra
ti
o
n
.
S
tatus
co
des
a
re
e
ras
ed
aft
e
r
7
2
h
our
s
o
r
ca
n
b
e
m
an
ua
ll
y
e
ra
s
e
d
b
y
p
ut
ti
ng
s
e
tu
ps
w
it
c
hS
W
1
-1
in
th
e
O
N
p
o
s
it
io
n
and
jum
pe
ri
n
g
R
,
W
/W
1
,
a
nd
Y
/Y
2
si
m
u
lt
an
eo
usl
y
unti
l
the
he
ar
tbe
a
t
flash
e
s.
Is
24V
p
re
s
e
nt
at
W
/W
1
,
W
2,
Y
1
,
Y
/Y
2
o
r
G
th
e
rm
os
tat
term
in
a
ls
on
the
fu
rn
a
ce
cont
ro
l?
C
heck
ro
o
m
th
e
rm
os
tat
o
r
in
te
rc
o
n
n
e
ctin
g
c
a
b
le
.
Discon
n
ec
t
a
ll
the
th
e
rm
os
tat
w
ire
s
fr
o
m
the
fur
nac
e
c
ont
rol
.
D
oes
the
p
robl
em
re
pe
at
w
h
e
n
u
s
in
g
a
ju
m
p
e
r
w
ir
e
?
R
e
pl
a
c
e
fur
nac
e
c
o
nt
rol
.
T
h
e
th
e
rm
os
tat
is
n
ot
c
o
m
p
ati
b
le
w
ith
th
e
fu
rn
a
c
e
c
o
n
tr
o
l.
E
ith
e
r
in
s
ta
ll
a
b
a
lla
st
re
sist
or
,
c
o
n
n
e
ct
th
e
C
om
2
4
V
th
e
rm
os
ta
t
term
in
al
to
th
e
therm
o
s
tat
,
o
r
repl
ace
th
e
the
rm
o
sta
t.
YE
S
NO
YE
S
YE
S
YE
S
YE
S
Y
E
S
YE
S
YE
S
STAR
T
YE
S
YE
S
NO
NO
NO
NO
NO
NO
NO
NO
YE
S
NO
NO
Trou
bles
hoo
tin
g
Gu
id
e
R
epl
a
c
e
fur
nac
e
c
ont
rol
.
YE
S
R
e
p
lac
e
fu
s
e
the
n
d
is
co
nn
e
c
t
the
rm
o
s
ta
t
leads
to
isol
a
te
sho
rt
c
ir
cui
t.
NO
Is
A
M
BER
L
E
D
s
ta
tu
s
lig
h
t
O
N
so
li
d
?
NO
YE
S
C
heck
to
m
ak
e
s
ur
e
that
th
e
c
o
rr
e
ct
m
o
d
e
l
p
lu
g
P
L
4
is
in
sta
ll
e
d
.
T
h
e
w
ir
in
g
schem
ati
c
sh
o
w
s
a
ll
v
a
lid
m
o
del
p
lu
gs.
Is
th
e
c
orr
e
ct
m
o
del
pl
u
g
in
stal
le
d?
T
h
e
c
o
n
tr
o
l
is
lo
ck
e
d
o
u
t
a
n
d
w
ill
a
u
to
-
rese
t
a
fte
r
1
ho
ur.
L
ock
o
ut
coul
d
b
e
d
u
e
to
a
n
y
of
th
e
fol
lo
w
ing
:
-
F
la
m
e
s
e
n
s
e
c
ir
cu
it
fa
il
u
re
.
-
G
as
v
a
lv
e
rel
a
y
s
tuck
o
pen
.
-
S
oft
w
a
re
c
he
ck
err
o
r.
Reset
p
o
w
er
to
cle
a
r
lock
o
ut.
R
e
p
lac
e
c
o
n
tr
o
l
if
c
od
e
rep
ea
ts
.
YE
S
R
epl
a
c
e
m
o
d
el
pl
u
g
P
L
4.
NO
