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Diagnostic Codes
-65-
In this section, the table details what the diagnostic codes on the Setback Control mean. The
diagnostic codes that can be displayed are different and depend on the gas valve / control that
is connected to the Setback Control.
Diagnostic
Code #
Description S9360B S9380B
Accessory
Module
WV8840
(standing
pilot gas
control
)
WV4460E
(intermittent
pilot gas
control
)
Conn
Setback Control not connected to gas valve / control or
improperl
y
wired to
g
ether.
xx x x x
2 Pressure switch failed to o
p
en
(
stuck closed
)
.xx x
4Weak pilot si
g
nal detected. x x x
6 Pilot signal detected out of sequence. x x x
18 Internal gas valve fault detected. x x x x
20 Failed to li
g
ht
p
ilot. x
23 Pilot signal detected out of sequence (before it should). x x x
24 Pilot signal detected out of sequence (after it should). x x x
29 Pressure switch failed to close
(
stuck open
)
. x x x
31 U
pp
er tank sensor out of s
p
ecification. x x
32 Lower tank sensor out of s
p
ecification. x x x x
55 Dam
p
er failed to close
(
stuck o
p
en
)
.xx
56 Dam
p
er failed to o
p
en
(
stuck closed
)
.xx
57
False ground in pilot assembly detected. Replace pilot
assembl
y
.
xx
58 Internal gas valve fault detected. x x
59 Line volta
g
e out of acce
p
table ran
g
e. x x
60 Wirin
g
issue
,
transformer out of
p
hase. x x
61 Internal gas valve fault detected. x x
62 I
g
nition failed, maximum number of tries. Soft lockout. x x
63 Ignition successful, but flame lost during run cycle. Soft lockout. x x x
64 Internal gas valve fault detected. x x x
65 Excessive tank temperature. x x
85
Soft Lockout due to maximum number of recycles exceeded,
last rec
y
cle was from
p
ressure switch o
p
en
x
87 A manual reset is re
q
uired due to Rollout Limit x
89 Equipment missin
g
or improperl
y
wired to
g
ether. x
93 Internal gas valve fault detected. x x
95 Flammable vapor sensor fault detected, see warning label. x
96 Flammable vapor sensor out of specification, possible short. x
143 Water heater tank leak detected. x
145 Leak sensor improperly installed or leak sensor resistor missing. x
Gas Valve / Control Model