41
T
T
T
T
T
R
R
R
R
R O U B L E S H O O
O U B L E S H O O
O U B L E S H O O
O U B L E S H O O
O U B L E S H O OT I N G
T I N G
T I N G
T I N G
T I N G
C
C
C
C
C
H A R
H A R
H A R
H A R
H A RT
T
T
T
T
Co
m
fo
r
tNet™
Therm
ost
at On
ly
Sym
ptom
s of A
bnor
m
al Opera
ti
on
(Leg
ac
y &
C
o
m
fort
N
et™ Therm
ost
at)
D
ia
g
no
st
ic
/St
atus
LED Codes
Fault De
scr
ipt
ion
Messa
ge
Code
P
o
ss
ib
le C
a
u
se
s
Correct
ive Action
s
No
tes
& Ca
utio
ns
x
Fur
nace
fa
ils to opera
te.
x
Int
egr
ate
d c
o
ntr
o
l m
o
du
le L
E
D
di
sp
lay
p
rovi
des
b
4
err
o
r c
o
de.
x
Com
fortNet™ therm
os
ta
t “
C
all for
Service” ic
on illum
inate
d.
x
Com
fortNet™ therm
os
ta
t scr
o
lls “
C
heck
Fur
nace” m
essa
ge.
b
4
x
Circ
ul
at
or bl
ow
er
m
o
tor
se
ns
es
a los
s
o
f ro
to
r
contr
o
l.
x
Circ
ul
at
or bl
ow
er
m
o
tor
se
ns
es
hig
h
cu
rrent
.
MOTOR
TRIPS
b4
x
A
b
n
o
rm
al m
o
tor
loa
d
in
g
,
su
dde
n
ch
an
ge in
sp
eed
or torq
ue, su
dd
en
bl
oc
ka
ge o
f fur
nac
e a
ir i
n
le
t
or
o
utl
et
.
x
Hi
gh
lo
ad
ing
cond
it
io
ns
, blo
cked
filter
s, ve
ry
rest
rictive ductw
ork,
bl
oc
ka
ge o
f fur
nac
e a
ir i
n
le
t
or
o
utl
et
.
x
Chec
k f
ilter
s, filte
r
gri
ll
s/
re
gi
st
er
s,
d
u
ct
sy
stem
, and
fur
nace a
ir
inle
t/outle
t for
bl
oc
ka
ge
s.
x
T
u
rn
pow
er
O
FF pr
io
r to
repa
ir.
x
Fur
nace
fa
ils to opera
te.
x
Int
egr
ate
d c
o
ntr
o
l m
o
du
le L
E
D
di
sp
lay
p
rovi
des
b
5
err
o
r c
o
de.
x
Com
fortNet™ therm
os
ta
t “
C
all for
Service” ic
on illum
inate
d.
x
Com
fortNet™ therm
os
ta
t scr
o
lls “
C
heck
Fur
nace” m
essa
ge.
b
5
x
Circ
ul
at
or bl
ow
er
m
o
tor
fai
ls to sta
rt 10
conse
cutive tim
es.
MTR LCKD
ROTOR
b5
x
O
b
st
ru
ct
io
n in
ci
rc
u
la
tor bl
ow
er
h
ous
ing
.
x
Sei
zed
ci
rcu
lato
r blower
m
o
to
r
b
earin
gs
.
x
Fail
ed
ci
rcul
ato
r
b
lower
m
o
to
r.
x
Ch
eck
ci
rcu
lato
r blower fo
r
ob
st
ru
ct
io
n
s. Rem
ove an
d
repa
ir
/re
pla
ce w
h
ee
l/
m
otor if
nece
ss
ary
.
x
Ch
eck
ci
rcu
lato
r blower
m
o
to
r
sha
ft r
o
ta
ti
on a
n
d m
o
tor.
Replace
m
o
tor if nec
ess
ary
.
x
T
u
rn
pow
er
O
FF pr
io
r to
repa
ir
x
Replace m
o
tor w
ith c
o
rrec
t
replacem
ent part.
x
Replace w
h
ee
l with c
o
rrec
t
replacem
ent part.
x
Fur
nace
fa
ils to opera
te.
x
Int
egr
ate
d c
o
ntr
o
l m
o
du
le L
E
D
di
sp
lay
p
rovi
des
b
6
err
o
r c
o
de.
x
Com
fortNet™ therm
os
ta
t “
C
all for
Service” ic
on illum
inate
d.
x
Com
fortNet™ therm
os
ta
t scr
o
lls “
C
heck
Fur
nace” m
essa
ge.
b
6
x
Circ
ul
at
or bl
ow
er
m
o
tor
shut
s
d
o
w
n
for ov
er
or
u
n
d
er vo
lt
ag
e
co
nd
itio
n
.
x
Circ
ul
at
or bl
ow
er
m
o
tor
sh
u
ts dow
n
d
u
e to ov
er
te
m
p
eratu
re co
ndi
ti
on
on
pow
er m
o
d
u
le.
MOTOR
VOLTS
b6
x
High AC line
vo
lta
ge
to f
u
rn
ace.
x
Low AC line volta
ge
to f
u
rn
ace.
x
High am
bient tem
per
atures.
x
Chec
k power
to f
u
rn
ace. Verify
li
n
e
v
o
lt
age to
fu
rn
ace i
s with
in
the r
ange
specifie
d on the
fur
nace r
ating
pla
te.
x
See
"P
rodu
ct
Des
cr
ipt
ion"
and
"L
oc
at
ion R
equ
ir
em
en
ts
&
Con
si
dera
tio
ns"
f
o
r f
u
rnace
in
st
all
at
ion
requi
rem
en
ts
.
x
T
u
rn
pow
er
O
FF pr
io
r to
repa
ir.
x
Fur
nace
fa
ils to opera
te.
x
Int
egr
ate
d c
o
ntr
o
l m
o
du
le L
E
D
di
sp
lay
p
rovi
des
b
7
err
o
r c
o
de.
x
Com
fortNet™ therm
os
ta
t “
C
all for
Service” ic
on illum
inate
d.
x
Com
fortNet™ therm
os
ta
t scr
o
lls “
C
heck
Fur
nace” m
essa
ge.
b
7
x
Circ
ul
at
or bl
ow
er
m
o
tor
d
o
es
n
o
t have enou
gh
inf
orm
ation to opera
te
pro
pe
rly
.
x
Mo
tor
fa
il
s to st
art 4
0
conse
cutive tim
es.
MOTOR
PARAMS
b7
x
E
rror
w
ith in
te
gra
te
d co
ntr
o
l
m
odule.
x
M
o
to
r
h
as
a
lo
ck
ed
ro
to
r
co
nd
it
ion.
x
Ch
eck
int
eg
rated
cont
rol
m
o
d
u
le
.
Veri
fy
co
nt
rol
is
popu
la
te
d
wit
h
corre
ct
share
d da
ta
se
t. See da
ta
erro
rs
ab
ov
e fo
r
d
etail
s.
x
Ch
eck
fo
r lo
ck
ed
rotor con
di
tio
n
(see er
ror c
o
de a
b
ove
for
d
etail
s).
x
T
u
rn
pow
er O
FF pr
io
r to
repa
ir.
x
Replace with correc
t
replacem
ent part(s).
x
Use m
em
o
ry
card for
the
spe
cif
ic m
odel.
x
Fur
nace
opera
tes a
t r
educe
d pe
rform
ance
or oper
ate
s on
low stag
e when
high sta
g
e is
expec
ted.
x
Int
egr
ate
d c
o
ntr
o
l m
o
du
le L
E
D
di
sp
lay
p
rovi
des
b
9
err
o
r c
o
de.
b
9
x
Ai
rflo
w is
lo
wer th
an
dem
ande
d.
LOW
I
D
AIRFLO
W
b9
x
Bl
ocked
fi
lt
ers
.
x
Restrictive duc
twor
k.
x
Un
d
ersi
ze
d
du
ct
wo
rk.
x
Chec
k f
il
ter
s for
b
loc
ka
ge.
Clea
n fi
lt
er
s or rem
ove
ob
st
ru
ct
io
n.
x
Chec
k d
u
ct
w
o
rk f
o
r b
loc
ka
ge.
Rem
ove ob
st
ru
ct
io
n.
V
erify
all
regis
ter
s are f
u
lly
ope
n.
x
V
erify
duc
tw
or
k i
s ap
pro
pr
ia
te
ly
siz
ed f
o
r
sy
stem
.
Resize
/re
pla
ce
ductw
ork if
nece
ss
ar
y
.
x
T
u
rn
pow
er
O
FF pr
io
r to
repa
ir.
