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T874 MULTISTAGE THERMOSTATS AND Q674 SUBBASES
60-2485—870
T874W
3-sta
g
e heat, 2-sta
g
e cool, manual chan
g
eover.
W1007 118 Obsolete. Hone
y
well lo
g
o; Westin
g
house special; used
with Q674L1256.
T8611M2025
(
pro
g
rammable
)
Includes ni
g
ht setback.
W1015 54 Hone
y
well lo
g
o; used with Q674B1216 and C815A1005;
used in Y594W1014.
T874W1015
W1023 233 Obsolete
. Lennox Advanced Heat Pump S
y
stem lo
g
o;
used with Q674L1280 and W89.
T874W1015
W1031 140 Obsolete
. No lo
g
o; Rheem part no. 41-20797-20; used
with Q674L1546 and C815A1005; used in Y594W1022.
T8611M2025
(
pro
g
rammable
)
Includes ni
g
ht setback.
W1049 100 Obsolete
. McQua
y
lo
g
o; part no. 61202501; 12°F
intersta
g
e differential between H2 and H3 for ni
g
ht
setback; used with Q674C1363.
T8611M2025
(
pro
g
rammable
)
Includes ni
g
ht setback.
W1056 220 Obsolete
. McQua
y
/Sn
y
der General lo
g
o; part no.
1202501; 12°F differential between H2 and H3 for ni
g
ht
setback; used with Q674C1363
(
61202502
)
.
See OEM for
replacement.
W1064 220 Obsolete
. AAF/Sn
y
der General lo
g
o; part no.
066804408; 12°F differential between H2 and H3 for
ni
g
ht setback; used with Q674C1363
(
66804408
)
.
See OEM for
replacement.
W1072 140 Obsolete
. Hone
y
well lo
g
o
(
Inter-Cit
y
Products
)
; used in
Y594W1030.
T8611M2025
(
pro
g
rammable
)
Includes ni
g
ht setback.
W1080 220 McQua
y
lo
g
o; part no. 073318901; Premier White®
color; 12°F differential between H2 and H3 for ni
g
ht
setback.
None
W1106 247 Obsolete
. Addison lo
g
o; part no. 843-277; °F/°C
scaleplate; used with Q674L1934 in Y594W1055.
T8611M2025
T874Y
Heat pump model; 2-sta
g
e heat, 2-sta
g
e cool, heat or
cool auto chan
g
eover.
Y1005 210 Obsolete
. Mammoth Water Source Heat Pump lo
g
o;
used with Q674E1353; used in Y594Y1004.
See OEM for
replacement.
Y1013 248 Obsolete
. WaterFurnace lo
g
o; part no. TA21H03;
Premier White® color; °F/°C scaleplate; used with
Q674F1675
(
32003081
)
.
See OEM for
replacement.
Table 8. T874 Cross Reference.
Model
Number
Fig.
No. Description
Trade Model
Replacement Remarks
a
Both the thermostat and subbase must be replaced.