Honeywell T874 Product Data page 38

T874 MULTISTAGE THERMOSTATS AND Q674 SUBBASES
Model Number
R1123 York logo; no. 025-21453C; Celsius scale.
R1131 Lennox logo; separate auxiliary heat power circuit;
fast cycle stage 2 heat anticipator; outdoor reset;
used with Q672L1144, C815A1013.
R1149 Westinghouse logo; adjustable stage 2 heat
anticipator; cooling changeover; fixed anticipator
stage 1 heat and cool; used with Q672L1110,
L1128, L1151.
R1156 Marvair logo; used with Q672L1094, L1250.
R1164 Bard; used with Q672L1185.
R1172 Heil Quaker; used with Q672L1193.
R1180 York; Celsius; used with Q672L1011.
R1198 TRADELINE; used with Q672L1227
R1206 For use with W89; used with Q672L1235.
R1214 Intertherm logo; used with Q672L1276.
R1222 York logo; used with C815A1039; adjustable
anticipator stage-2 heat; used with Q672L1284
R1230 Amana logo; no. C62397-1; used with
Q672L1300, W89.
R1255 Singer logo; used with Q672L1326 and W89.
R1271 Westinghouse logo; used with Q672L1375 and
W89.
R1297 York; Celsius scale; used with Q672L1011.
R1305 Used with Q672L1235 and W89.
R1321 Duotherm logo; used with Q672L1409, and W89.
R1339 Williamson; used with Q672L1391.
T872S Heat pump model; 2-stage heat plus changeover,
1-stage cool.
S1005 Westinghouse logo; adjustable anticipator stage 1
and 2 heat; fixed anticipator stage 1 heat;
changeover with heating: used with Q672C1045
T872T 1-heat stage, 1-vent and 2-cool stages.
T1004 Trane logo; used with Q672B1129.
T872W 3-heat stages, 2-cool stages, manual changeover
W1019 Lennox logo; no. 52C7501; used with Q672L1342
and C815A1013.
W1027 Westinghouse logo; used with Q672L1268 and
C815A1021.
W1035 TRADELINE; used with C815A1043 and
Q672B1251.
a
When replacing a T872 Thermostat and Q672 Subbase, always replace both the thermostat and the subbase.
60-2485—8
Table 6. T872-T874 Thermostat Cross Reference.
Description
38
T874 Trade
Replacement a
Y594R1664
None
Y594R1243 Wiring differences (old=new):
W=W2.
Y594R1243 Replacement has auto fan in
Emergency Heat mode.
Y594R1243
Y594R1243 Wiring differences (old=new): B=X,
W=W2.
Y594R1664
Y594R1243
None
Y594R1300 Wiring differences (old=new):
W1=B, Z=L, K=E.
Y594R1672
None
None
Y594R1664
None
None
None
Y594R1243
T874C1018/ Wiring differences (old=new):
Q674C1058 V=RC-RH, F=G, C=Y1, Z=B,
H2=W2; W1-Y1 jumper required.
None
None
None
Y594W1014
Remarks