Goodman Mfg MVC95 - Manual (Page 55)

T
ROUBLESHOOTING
C
HART
55
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 on high
stage;
fur
nace
opera
tes
nor
m
ally
on low stage.
x
Int
egr
ate
d c
o
ntr
o
l m
o
du
le L
E
D
di
sp
lay
p
rovi
des
E8
err
o
r
code.
E8
x
Hi
gh
st
ag
e p
ressu
re
sw
it
ch c
irc
u
it
is c
lose
d at
sta
rt
of heating cy
cle.
x
In
du
ced
d
raft
blo
wer i
s
op
era
ti
ng.
x
Fur
nace is opera
ting
on
low
s
ta
g
e
on
ly
P
S2
CLOSED
E8
x
Hi
gh
st
ag
e p
ressu
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
Replace
high sta
g
e pr
essure
sw
it
ch.
x
Repa
ir s
h
or
t i
n
w
ir
in
g
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
Fur
nace fa
ils
to
opera
te on high
stage;
fur
nace
opera
tes
nor
m
ally
on low stage.
x
Int
egr
ate
d c
o
ntr
o
l m
o
du
le L
E
D
di
sp
lay
p
rovi
des
E9
err
o
r
code.
E9
x
Hi
gh
st
ag
e p
ressu
re
sw
it
ch
ci
rc
u
it is no
t
close
d.
x
In
du
ced
d
raft
blo
wer i
s
op
era
ti
ng.
x
Fur
nace is opera
ting
on
low
s
ta
g
e
on
ly
PS
2
OPEN
E9
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
proper
ly
.
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
p
oin
t o
r
m
al
fu
n
cti
onin
g
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.
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 replac
em
ent
par
t.
x
Replace induce
d
draf
t
blower with
corr
ec
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
EA
err
o
r
code.
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.
EA
x
Pol
ari
ty
of 11
5
vo
lt
A
C
is re
ver
se
d
REVERS
ED
PLTY
EA
x
Pol
ari
ty
of 11
5
vo
lt
A
C
pow
er
to
fur
nace or
in
te
g
rat
ed m
odule
is
rever
ed.
x
Po
or un
it
groun
d
x
Revi
ew wi
ri
ng
di
ag
ram t
o
corre
ct polar
it
y
.
x
Veri
fy
p
rop
er groun
d. Co
rrect
i
f
nece
ss
ary
.
x
Chec
k a
nd c
o
rr
ect w
irin
g.
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
d
0
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.
d0
x
D
ata n
o
t y
et on
netw
ork.
NO NET
DATA
d0
x
Fur
nace does not
co
ntain
an
y
sh
ar
ed
d
at
a.
x
Po
pul
at
e sh
ared
d
ata s
et
us
in
g
m
e
m
o
ry
card.
x
T
u
rn
pow
er
O
FF pr
io
r to
repa
ir
x
Use m
e
m
o
ry
card for
the
spe
cif
ic m
odel.
x
Insert m
e
m
o
ry
card
BEFORE t
u
rn
ing
power
O
N
. Mem
ory
card
m
ay
be
rem
oved af
ter
dat
a i
s
loa
de
d.
x
T
u
rn
pow
er
O
FF bef
ore
rem
oving m
e
m
o
ry
ca
rd.
x
Error c
ode w
ill be cle
ared
once
data is loaded.