2
0
1
2
0
vo
l
t
pote
n
tia
l
e
x
posure
. I
so
l
ate
the
app
l
ia
n
ce
a
nd
reco
n
firm
power
is
d
isco
nn
ecte
d
usi
ng
a
mu
l
ti
-
meter
.
WA
R
NIN
G
Ser
vi
ce
Proce
du
re
I
:
Th
er
m
o
stat Ci
rc
uit T
e
sting and
R
e
pla
ce
m
e
nt
Thermostat
Sensor
(Thermister)
Replacement
Procedure
S
tep
1
.
Positio
n
mai
n
power
switch
to
“O
FF
”
S
tep
2.
Disco
nn
ect
(
u
n
p
l
u
g)
water
heater
from
1
2
0
vo
l
t
power
source
.
S
tep
3
.
U
n
-l
atch
a
nd
remove
top
surrou
nd
cover
from
top
of
heater
.
S
tep
4.
Disco
nn
ect
temperature
se
n
sor
from
co
n
tro
l
(
see
photos
be
l
ow
)
.
S
tep
5
.
U
n
c
l
ip
se
n
sor
from
we
ll
a
nd
pu
ll
se
n
sor
to
remove
,
d
o
n
ot
remove
we
ll
(
see
picture
)
.
S
tep
6
. I
n
sta
ll
n
ew
se
n
sor
assemb
l
y
i
n
to
we
ll
a
nd
rei
n
sta
ll
se
n
or
c
l
ip
.
S
tep
7
.
Reco
nn
ect
the
se
n
sor
co
nn
ector
to
the
co
n
tro
l
boar
d
a
nd
route
the
wire
har
n
ess
throu
g
h
the
same
path
that
it
was
remove
d
.
S
tep
8
.
Restore
1
2
0
vo
l
t
power
supp
l
y
a
nd
water
supp
l
y
to
water
heater
,
check
a
nd
repair
a
n
y
l
eaks
fou
nd
.
Co
n
firm
proper
operatio
n
fo
ll
owi
ng
the
l
i
g
hti
ng
i
n
structio
n
s
o
n
the
l
i
g
hti
ng
i
n
structio
n
l
abe
l
or
the
l
i
g
hti
ng
i
n
structio
n
l
ocate
d
i
n
the
i
n
sta
ll
atio
n
a
nd
operati
ng
i
n
structio
n
ma
n
ua
l.
S
tep
9
.
Rep
l
ace
surrou
nd
cover
o
n
top
of
heater
.
S
e
n
sor
c
l
ip
sow
n
proper
l
y
i
n
sta
ll
e
d
S
e
n
sor
show
n
fu
ll
y
i
n
serte
d
i
n
to
we
ll
Disco
nn
ect
se
n
sor
har
n
ess
from
co
n
tro
l
boar
d
20