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T874 MULTISTAGE THERMOSTATS AND Q674 SUBBASES
60-2485—8 66
R1079 123 Obsolete. Ruud logo; part no. UXMT-C70; used with
Q674L1157.
Y594R1243
a
R1087 120 Obsolete. Honeywell logo; Special for Dunham Bush;
use with Q674L.
Y594R1664
a
R1095 123 Obsolete. Rheem logo; part no. RXMT-C70; used with
Q674L1157.
T874R1152/
Y594R1243
a
R1103 104 Obsolete. Westinghouse logo; used with Q674L.
Y594R1243
a
R1111 116,
104
Obsolete. Marvair logo; H2 anticipator factory set at
1.2A; used with Q674L1215, L1082; used in
Y594R1128.
Y594R1243
a
Replacement has auto fan in
Emergency Heat mode.
R1129 113 Bard logo; used with Q674L1181.
Y594R1243
a
Wiring differences (old=new):
X1=X.
R1137 108,
125
Obsolete
. Honeywell logo; Heil Quaker part no.
HQ711597HW; used with Q674L1132; used in
Y594R1110.
Y594R1292
a
R1145 120 Obsolete. York logo; °C scaleplate; H2 anticipator is
fixed; used with Q674L1272; used in Y594R1102.
Y594R1664
a
R1152 115 Honeywell logo; used with Q674L1207, L1033; used in
Y594R1243.
Y594R1243
a
R1160 182 Obsolete. Honeywell Advanced Heat Pump System
logo; used with Q674L1298 and W89.
None
R1178 110,
111
Obsolete
. Lennox logo; part no. 24F5601; °F/°C
scaleplate; auxiliary heat circuit powered by separate
transformer; fast cycle stage H2 anticipator; requires
outdoor reset and independent circuits; used with
Q674L1165, L1355.
Y594R1763
a
Wiring differences (old=new):
V-VR=R, M=Y, F=G, X=B,
Y=W, A=T, R=O, E=X2.
R1186 182 Obsolete. Honeywell Advanced Heat Pump System
logo; used with Q674L1231 and W89.
None
R1194 115 Obsolete
. Amana logo; used with Q674L1249 and W89.
Y594R1243
a
R1202 201 Obsolete. Intertherm logo; part no. 9111871; used with
Q674L1264 or Q674L1595; used in Y594R1185.
Y594R1672
a
Wiring differences (old=new):
W2=W, Z=no connection,
K=X, W=G, W1=H, X=B.
R1210 101 Obsolete
. Roca logo; °C scaleplate; used with
Q674L1017.
Y594R1243
a
Wiring differences (old=new):
W=W2, X=L, B=X.
R1228 120 Obsolete
. York logo; part no. 2TH11702524A; °C
scaleplate; used with Q674L1272 and C815A1005;
used in Y594R1144.
Y594R1672
a
R1236 115 Obsolete. Williamson logo; includes Allen wrench and
screws to lock cover; used with Q674L1348.
T874R1152
R1244 115 Obsolete
. Westinghouse logo; used with Q674L1314
and W89.
T874R1152/
Y594R1243
a
R1251 120 Obsolete. York logo; part no. 2TH11702324A; H2
anticipator is fixed; used with Q674L1272 and
C815A1039.
Y594R1672
a
R1269 122 Obsolete. Fedders multi logo; part no.
THTX-120-HEHB 88-58-00540-001; used with
Q674L1066; used in Y594R1037.
Y594R1615
a
Wiring differences (old=new):
K=E, C=X, W1=B, Z=L.
R1285 123 Obsolete
. Honeywell logo; Rheem part no. 41-20796-15;
used with Q674L1157.
Y594R1243
a
R1301 113 Obsolete. Comfortmaker logo; part no. 1505-714; used
with Q674L1181; used in Y594R1417.
Y594R1243
a
Wiring differences (old=new):
X1=X.
Table 8. T874 Cross Reference.
Model
Number
Fig.
No. Description
Trade Model
Replacement Remarks
a
Both the thermostat and subbase must be replaced.