17
Is AMBER
LED
stat
u
s l
ight on?
Is there
24V
at SE
C-1 and
SEC-2?
Is there
115V
at L1
and L2?
Replace
fur
nace
co
ntrol
.
Is door
sw
itch
clo
se
d?
Replace
tra
nsforme
r.
Replace
door
sw
itch.
Is there
115V
going
to
sw
itch?
Close
d
oor sw
itch
.
Is
circuit brea
ker
cl
osed?
Check for
con
tinui
ty
in w
ire from
cir
cui
t
breaker
to furna
ce
.
Close
cir
cui
t b
reaker and
go
ba
ck to
START.
Is AMBER
LED
status
light blin
king
rapidly
w
ithout a
pa
use?
Check for
corr
ect l
ine v
oltage po
larity
. If
units
ar
e tw
inned, check for
proper
low
-
v
oltage (24V)
tr
ansformer pha
sing
.
Is AMBER
LED
status
light blin
king
ON/OFF
slow
ly
w
it
h
a
combina
tion
o
f
Determine
status code.
The
sta
tus
co
de
determined
by
the
number o
f
shor
t
To reca
ll p
rev
ious
statu
s co
des di
scon
nect
the R
thermo
sta
t
conn
ecti
on,
rese
t pow
er, an
d pu
t
setup
sw
itch
S
W
1-1
in
th
e ON p
o
si
tion
. The
AM
BER L
E
D
w
ill repeat. S
tatus
code
s
are era
sed
a
fter
72
hours or
ca
n be
ma
nually
erased
by
putting
se
tup
switch
S
W
1-
1 in
the
O
N
posi
tion
and jumperi
ng R
, W/W1
, and
Y
/Y
2
si
multaneou
sly
setu
p
sw
itch
S
W
1-
1
in the
OFF
po
si
tio
n
.
Wa
s
there
a
prev
ious
statu
s co
de o
the
r
than
#11?
Go to se
ctio
n
be
lo
w
for
th
e statu
s
cod
e
Does the
co
ntrol
re
spond
to
W/W1
, W2,
Y
1
, Y
/Y
2
, and
G
(2
4V)
the
rm
o
sta
t
signal
s?
Run sy
stem
th
roug
h a l
o
w
-heat, mediu
m-
heat,
hig
h-hea
t,
or
cooling
cy
cle
to
che
ck
operatio
n. S
ta
tu
s
codes are
era
sed
after
72 hour
s or
can
be
manually
erased
by
putti
ng
se
tup
sw
itc
h S
W
1-1
in
the
ON
posi
tion and jumper
ing
R, W/W1
, and
Y
/Y
2
simultaneo
usl
y until sta
tu
s
code
Is
24V
pre
sen
t a
t
W/
W1
, W2,
Y
1
, Y
/Y
2
or
G thermosta
t
termi
nals on
the
furna
ce
control?
Check room
th
ermosta
t or
inter
conne
cting cab
le.
Discon
nect
all
the
thermostat w
ires
fro
m
the furn
a
ce
control.
Does
the
problem
r
epeat w
hen using
a
jumper w
ire?
Replace
fur
nace
co
ntrol
.
The the
rmostat
is
n
o
t
com
p
a
tible
w
ith t
h
e
furna
ce
con
trol
. Ei
ther in
stall a
ball
ast
resi
sto
r, conne
ct th
e Com24V
thermo
stat
terminal
to
the ther
mosta
t,
or
repl
ace
the
thermo
sta
t.
Y
ES
NO
YE
S
Y
ES
YE
S
Y
ES
YE
S
S
E
Y
S
E
Y
S
E
Y
YE
S
START
YE
S
YE
S
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
Troubleshooting
Guide
A07581
58MV
C
