T874 MULTISTAGE THERMOSTATS AND Q674 SUBBASES
60-2485—850
C1216 44 Obsolete. Fasco part no. 1230-8197. T874C1018
C1224 105 Obsolete. S
uare D lo
o. T874C1018
C1240 44 Hone
well lo
o; Hone
well Canada TRADELINE model;
°C scaleplate; includes Allen wrench and screws to lock
cover.
T874C1018 Replacement has °F
scaleplate.
C1257 44 Obsolete
. Sin
er part no. 0200-5931; 8°F
4.4°C
differential between H1 and H2 heat.
T874C1125 Replacement has 12°F
differential between H1 and
H2 heat.
C1265 44 Obsolete
. Sin
er special; °C scaleplate; 5°C
8°F
differential between H1 and H2 heat.
T874C1125 Replacement has 12°F
differential between H1 and
H2 heat; replacement has °F
scaleplate.
C1273 44 Hone
well lo
o; °C scaleplate; includes Allen wrench
and screws to lock cover; non-ad
ustable ran
e stops
factor
set at 23°C
max. heat and min. cool
73°F
.
T874C1018 Replacement has °F
scaleplate.
C1281 44 Obsolete
. Heat Wave special. T874C1018
C1307 44 Obsolete. Friedrich Climate Master lo
o. T874C1018
C1315 44 Obsolete. Wesco lo
o; heat anticipator factor
set at
0.8A.
T874C1018
C1323 44 Obsolete
. Le Chauffa
e Urbain special; °C scaleplate. T874C1018 Replacement has °F
scaleplate.
C1331 82, 141 Obsolete
. Duotherm lo
o; used with Q674E or Q674F. T874C1018
C1349 61 Obsolete
. Si
ler lo
o; used with Q674N1023. T874C1018
C1372 52 Obsolete. Hone
well lo
o; used with Q674B1190. T874C1018/
Q674B1034
For s
stems re
uirin
automatic fan in coolin
mode
onl
.
T874C1018/
Q674B1075
For s
stems re
uirin
automatic fan in heatin
and
coolin
.
C1398 105 Obsolete. Fedders lo
o; °F/°C scaleplate; used with
Q674L1090.
Y594R1425
a
Wirin
differences
old=new
:
K=E, C=X; replacement has °F
scaleplate.
C1406 105 Obsolete
. Climatrol lo
o; °F/°C scaleplate; used with
Q674L1090.
Y594R1425
a
Wirin
differences
old=new
:
K=E, C=X; replacement has °F
scaleplate.
C1414 105 Obsolete
. Airtemp lo
o; °F/°C scaleplate; used with
Q674L1090.
Y594R1425
a
Wirin
differences
old=new
:
K=E, C=X; replacement has °F
scaleplate.
C1422 187 Obsolete
. Hone
well lo
o; used with Q674B1208. None
C1430 49 Obsolete
. Lennox Zone Master Two-Speed lo
o; part
no. 25F7201; used with Q674B1224.
T874C1018
C1448 110,
190
Obsolete
. Lennox lo
o; part no. 24F5101; meets DoD
specifications; re
uires outdoor reset; used with
Q674L1165, L1355.
Y594R1763
a
Wirin
differences
new=old
:
R=V-VR, Y=M, G=F, B-X,
W=Y, T=A, O=R, X2=E;
Emer
enc
Heat becomes
sta
e 1 heat source.
C1455 127 Obsolete
. Williamson lo
o; used with Q674L1322.
Y594R1243
a
C1463 82 Obsolete. AAF lo
o; °C scaleplate. T874C1018 Replacement has °F
scaleplate.
C1471 56 Obsolete
. Mammoth lo
o; part no. 71120102; used with
Q674B1257; used in Y594C1314.
T874C1018
Table 8. T874 Cross Reference.
Model
Number
Fig.
No. Description
Trade Model
Replacement Remarks
a
Both the thermostat and subbase must be replaced.
