T874 MULTISTAGE THERMOSTATS AND Q674 SUBBASES
60-2485—866
R1079 123 Obsolete. Ruud lo
g
o; part no. UXMT-C70; used with
Q674L1157. Y594R1243a
R1087 120 Obsolete. Hone
y
well lo
g
o; Special for Dunham Bush;
use with Q674L. Y594R1664a
R1095 123 Obsolete. Rheem lo
g
o; part no. RXMT-C70; used with
Q674L1157. T874R1152/
Y594R1243a
R1103 104 Obsolete. Westin
g
house lo
g
o; used with Q674L. Y594R1243a
R1111 116,
104 Obsolete. Marvair lo
g
o; H2 anticipator factor
y
set at
1.2A; used with Q674L1215, L1082; used in
Y594R1128.
Y594R1243aReplacement has auto fan in
Emer
g
enc
y
Heat mode.
R1129 113 Bard lo
g
o; used with Q674L1181. Y594R1243aWirin
g
differences
(
old=new
)
:
X1=X.
R1137 108,
125 Obsolete. Hone
y
well lo
g
o; Heil Quaker part no.
HQ711597HW; used with Q674L1132; used in
Y594R1110.
Y594R1292a
R1145 120 Obsolete. York lo
g
o; °C scaleplate; H2 anticipator is
fixed; used with Q674L1272; used in Y594R1102. Y594R1664a
R1152 115 Hone
y
well lo
g
o; used with Q674L1207, L1033; used in
Y594R1243. Y594R1243a
R1160 182 Obsolete. Hone
y
well Advanced Heat Pump S
y
stem
lo
g
o; used with Q674L1298 and W89. None
R1178 110,
111 Obsolete. Lennox lo
g
o; part no. 24F5601; °F/°C
scaleplate; auxiliar
y
heat circuit powered b
y
separate
transformer; fast c
y
cle sta
g
e H2 anticipator; re
q
uires
outdoor reset and independent circuit s; used with
Q674L1165, L1355.
Y594R1763aWirin
g
differences
(
old=new
)
:
V-VR=R, M=Y, F=G, X=B,
Y=W, A=T, R=O, E=X2.
R1186 182 Obsolete. Hone
y
well Advanced Heat Pump S
y
stem
lo
g
o; used with Q674L1231 and W89. None
R1194 115 Obsolete. Amana lo
g
o; used with Q674L1249 and W89. Y594R1243a
R1202 201 Obsolete. Intertherm lo
g
o; part no. 9111871; used with
Q674L1264 or Q674L1595; used in Y594R1185. Y594R1672aWirin
g
differences
(
old=new
)
:
W2=W, Z=no connection,
K=X, W=G, W1=H, X=B.
R1210 101 Obsolete. Roca lo
g
o; °C scaleplate; used with
Q674L1017. Y594R1243aWirin
g
differences
(
old=new
)
:
W=W2, X=L, B=X.
R1228 120 Obsolete. York lo
g
o; part no. 2TH11702524A; °C
scaleplate; used with Q674L1272 and C815A1005;
used in Y594R1144.
Y594R1672a
R1236 115 Obsolete. Williamson lo
g
o; includes Allen wrench and
screws to lock cover; used with Q674L1348. T874R1152
R1244 115 Obsolete. Westin
g
house lo
g
o; used with Q674L1314
and W89. T874R1152/
Y594R1243a
R1251 120 Obsolete. York lo
g
o; part no. 2TH11702324A; H2
anticipator is fixed; used with Q674L1272 and
C815A1039.
Y594R1672a
R1269 122 Obsolete. Fedders multi lo
g
o; part no.
THTX-120-HEHB 88-58-00540-001; used with
Q674L1066; used in Y594R1037.
Y594R1615aWirin
g
differences
(
old=new
)
:
K=E, C=X, W1=B, Z=L.
R1285 123 Obsolete. Hone
y
well lo
g
o; Rheem part no. 41-20796-
15; used with Q674L1157. Y594R1243a
R1301 113 Obsolete. Comfortmaker lo
g
o; part no. 1505-714; used
with Q674L1181; used in Y594R1417. Y594R1243aWirin
g
differences
(
old=new
)
:
X1=X.
Table 8. T874 Cross Reference.
Model
Number Fig.
No. Description Trade Model
Replacement Remarks
aBoth the thermostat and subbase must be replaced.