39
T
ROUBLESHOOTING
C
HART
Co
m
fo
r
tNet
Therm
ost
at On
ly
Sym
ptom
s of A
bnor
m
al Opera
ti
on
(Non-Com
m
unicating & Com
fortNet™
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
n
o
s
ign
al
.
x
Com
fortNet
therm
ostat “
C
all for Se
rvice”
ico
n il
lum
ina
te
d
x
Com
fortN
et
th
erm
ost
at sc
rolls “
C
heck
Fur
nace” m
essa
ge
N
one
x
No 115
powe
r to fur
nace
o
r no
24
v
olt
po
wer to
in
te
gra
te
d co
n
tro
l
m
odule
x
Blow
n f
u
se
or c
irc
ui
t
brea
ker
x
In
te
g
ra
ted
con
trol
m
odule has
an
in
ter
n
al
fau
lt
INTERNAL
FAULT
EE
x
Manu
al
di
sconn
ect
swi
tc
h
OFF,
d
o
o
r s
w
it
ch
op
en
o
r 24
vo
lt
wi
re
im
p
ro
p
erl
y
co
nn
ect
ed o
r lo
os
e
x
Blow
n f
u
se
or c
irc
ui
t
brea
ker
x
Int
egr
ate
d c
o
ntr
o
l m
o
du
le
has
an
in
ter
na
l fa
ul
t
x
A
ss
u
re
1
1
5
a
nd 24 v
o
lt pow
er t
o
fur
nace a
n
d integr
ate
d control
m
odule.
x
Ch
eck
int
eg
rated
cont
rol
m
o
d
u
le
fuse (3A). Re
place if
nece
ssary
.
x
Ch
eck
fo
r pos
si
bl
e
sh
o
rts
in
1
1
5
and
24
vo
lt
ci
rcu
its
. Rep
ai
r as
nece
ss
ary
.
x
Replace
ba
d integr
ate
d control
m
odule.
x
T
u
rn
pow
er
O
FF pr
io
r to
repa
ir.
x
Replace inte
gra
te
d
contr
o
l
m
odule f
u
se
w
it
h
3A
au
to
m
o
ti
v
e f
u
se.
x
Read prec
autions in
“E
lectros
tatic Disc
ha
rge”
sec
ti
o
n
of m
anua
l.
x
Replace inte
gra
te
d
contr
o
l
m
odule w
ith
cur
ren
t
replacem
ent parts.
x
L
E
D
dis
play
in
di
cat
es
O
n
O
n
x
Norm
al opera
tion
N
one N
one
x
Norm
al opera
tion
x
N
one
x
Norm
al opera
tion
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
E0
err
o
r code.
x
Com
fortNet
therm
ostat “
C
all for Se
rvice”
ico
n il
lum
ina
te
d
.
x
Com
fortN
et
th
erm
ost
at sc
rolls “
C
heck
Fur
nace” m
essa
ge.
E0
x
Fur
nace lockout due
to
an e
x
ce
ss
ive num
ber of
igni
ti
on
“
ret
ri
es
” (3
to
ta
l)
LOCKOUT E0
x
Failur
e to es
ta
blish f
la
m
e. Cause
m
a
y
be
no gas to b
u
rn
er
s,
fro
n
t
co
ver p
res
su
re sw
it
ch
st
uc
k o
p
en
,
b
ad
ig
ni
ter or ig
ni
ter
al
ign
m
en
t,
im
proper or
ifi
ces, or
co
at
ed
/ox
id
ized
o
r i
m
p
rop
erl
y
conne
cte
d f
lam
e sens
or.
x
Los
s of f
lam
e after es
tablis
hm
ent.
Cau
se m
a
y
be inte
rru
pte
d
gas
su
p
p
ly
, lazy
burne
r fl
am
es
(im
prope
r ga
s pr
es
su
re
or
rest
ricti
on
in
fl
ue and/
o
r
co
m
b
u
st
ion
ai
r
p
ipi
ng
), front
co
ver p
res
su
re sw
it
ch
ope
n
in
g
, or
im
proper
in
d
u
ce
d d
ra
ft b
low
er
perf
orm
ance.
x
Locate and c
o
rre
ct
ga
s
in
terr
u
p
ti
on.
x
Chec
k fr
on
t c
o
v
er pr
es
su
re
sw
it
ch
op
erat
ion
(hose, wi
rin
g
,
co
n
tac
t
o
p
er
at
io
n)
. C
o
rr
ect
if
nece
ss
ary
.
x
Replace
or rea
lign igniter.
x
Chec
k f
lam
e sense
signal. Sa
nd
se
nso
r i
f
co
at
ed
an
d/or o
xid
iz
ed
.
x
Chec
k f
lue
p
ip
in
g
f
o
r bl
oc
ka
ge,
p
rop
er l
eng
th
, elbo
ws, an
d
term
inat
ion.
x
Veri
fy
p
rop
er ind
uced
d
raft
bl
ow
er perf
orm
ance.
x
T
u
rn
pow
er
O
FF pr
io
r to
repa
ir.
x
Ig
nit
er is
fragi
le
,
h
and
le
with care.
x
Sand flam
e sensor with
e
m
ery cloth.
x
See “
V
ent/Flue P
ipe
”
se
ct
ion
fo
r p
ipi
ng
d
etai
ls
.
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
E1
err
o
r
code.
x
Com
fortNet
therm
ostat “
C
all for Se
rvice”
ico
n il
lum
ina
te
d
.
x
Com
fortN
et
th
erm
ost
at sc
rolls “
C
heck
Fur
nace” m
essa
ge.
E1
x
Lo
w s
tag
e
p
res
su
re
sw
it
ch
ci
rc
ui
t
is
clo
se
d
a
t
sta
rt
of heating cy
cle.
P
S1
CLOSED
E1
x
Lo
w
st
ag
e p
res
su
re
swi
tc
h
con
tacts
st
ickin
g
.
x
Sh
orts
in
pressu
re s
w
it
ch
ci
rcu
it
w
iri
ng.
x
Boar
d t
im
ing w
it
h
PCBK
F1
01
contr
o
l will dete
ct a c
lose
d
pre
ssure switc
h
after a
failed
ig
n
it
io
n
a
ttem
pt a
nd
bef
ore
the
ne
xt a
tt
em
p
t and m
a
y
di
sp
lay
a
m
islead
in
g E
1
c
o
de.
x
Replace low sta
ge pr
ess
ure
sw
it
ch.
x
Repa
ir s
h
or
t i
n
w
ir
in
g
.
x
D
isre
gar
d
E
1
c
o
de s
h
ow
n
betw
ee
n
ig
n
it
ion a
tt
em
p
ts if
fur
nace
is e
q
u
ippe
d with
PCBK
F1
01 c
o
ntr
o
l b
o
ar
d. L
o
o
k
fo
r caus
e o
f
no
ig
ni
tio
n
–
gas
supp
ly
,
g
as
v
alv
e s
w
it
ch
o
ff,
im
proper
ga
s m
anifo
ld
pr
es
su
re,
im
p
ro
p
er L.P. conv
ers
ion
.
x
T
u
rn
pow
er
O
FF pr
io
r to
repa
ir.
x
Replace pre
ssure switch
with cor
rec
t re
pla
cem
ent
par
t.
x
The boar
d c
h
ec
ks f
o
r
an
op
en pre
ss
ure sw
it
ch
w
h
en
a call for
hea
t is rec
eive
d.
It w
il
l
on
ly
pow
er t
h
e
in
d
u
cer a
n
d pr
oce
ed
w
it
h
the
call f
o
r he
at
if the
p
res
su
re
sw
it
ch
is
open
.
x
In
du
ced
d
raft
blo
wer ru
ns
co
nti
nuo
usl
y
wi
th
no
furth
er fu
rn
ace op
erat
ion
.
x
Int
egr
ate
d c
o
ntr
o
l m
o
du
le L
E
D
di
sp
lay
p
rovi
des
E2
err
o
r
code.
x
Com
fortNet
therm
ostat “
C
all for Se
rvice”
ico
n il
lum
ina
te
d
.
x
Com
fortN
et
th
erm
ost
at sc
rolls “
C
heck
Fur
nace” m
essa
ge.
E2
x
Lo
w s
tag
e
p
res
su
re
sw
it
ch
ci
rc
u
it is no
t
close
d.
PS
1
OPEN
E2
x
Pres
su
re sw
it
ch
h
o
se
bl
oc
ke
d
pi
nc
he
d,
or c
o
nne
cte
d im
pro
perly
.
x
Bl
ocked
fl
ue and/
o
r
in
le
t ai
r pip
e,
bl
oc
ke
d dr
ai
n sy
stem
or w
ea
k
in
d
u
ce
d dr
aft
bl
ow
er.
x
Inc
orrec
t pre
ssure switc
h
set point
o
r m
al
fu
n
cti
oni
ng
s
w
it
ch
conta
cts.
x
Loose or im
properly
conne
cte
d
w
iri
ng.
x
In
sp
ect
p
res
su
re s
w
itch
hos
e.
Repa
ir
/re
pla
ce if
nec
essa
ry
.
x
Ins
pe
ct f
lu
e an
d
/or
in
let a
ir
p
ipi
ng
fo
r bl
ockag
e,
p
rop
er
len
g
th,
e
lbow
s,
an
d te
rm
inat
ion.
x
Chec
k
drain
sy
stem
. Corre
ct
as
nece
ss
ary
.
x
Chec
k i
n
d
u
ce
d
dra
ft
bl
ow
er
perf
orm
ance. Corr
ect as
nece
ss
ary
.
x
Co
rrect
p
res
su
re s
w
itch
set
p
oin
t
or c
o
n
tac
t m
o
tio
n.
x
Tighte
n
or c
o
rrec
t wiring
co
nne
ct
ion.
x
T
u
rn
pow
er
O
FF pr
io
r to
repa
ir.
x
Replace pre
ssure switch
with cor
rec
t re
pla
cem
ent
par
t.
x
Replace induce
d
draf
t
blower with
corr
ec
t
replacem
ent part.
