T874 MULTISTAGE THERMOSTATS AND Q674 SUBBASES
60-2485—8
70
T874W
3-stage heat, 2-stage cool, manual changeover.
W1007
118
Obsolete. Honeywell logo; Westinghouse special; used
with Q674L1256.
T8611M2025
(programmable)
Includes night setback.
W1015
54
Honeywell logo; used with Q674B1216 and C815A1005;
used in Y594W1014.
T874W1015
W1023
233
Obsolete. Lennox Advanced Heat Pump System logo;
used with Q674L1280 and W89.
T874W1015
W1031
140
Obsolete. No logo; Rheem part no. 41-20797-20; used
with Q674L1546 and C815A1005; used in Y594W1022.
T8611M2025
(programmable)
Includes night setback.
W1049
100
Obsolete. McQuay logo; part no. 61202501; 12°F
interstage differential between H2 and H3 for night
setback; used with Q674C1363.
T8611M2025
(programmable)
Includes night setback.
W1056
220
Obsolete. McQuay/Snyder General logo; part no.
1202501; 12°F differential between H2 and H3 for night
setback; used with Q674C1363 (61202502).
See OEM for
replacement.
W1064
220
Obsolete. AAF/Snyder General logo; part no.
066804408; 12°F differential between H2 and H3 for
night setback; used with Q674C1363 (66804408).
See OEM for
replacement.
W1072
140
Obsolete. Honeywell logo (Inter-City Products); used in
Y594W1030.
T8611M2025
(programmable)
Includes night setback.
W1080
220
McQuay logo; part no. 073318901; Premier White®
color; 12°F differential between H2 and H3 for night
setback.
None
W1106
247
Obsolete. Addison logo; part no. 843-277; °F/°C
scaleplate; used with Q674L1934 in Y594W1055.
T8611M2025
T874Y
Heat pump model; 2-stage heat, 2-stage cool, heat or
cool auto changeover.
Y1005
210
Obsolete. Mammoth Water Source Heat Pump logo;
used with Q674E1353; used in Y594Y1004.
See OEM for
replacement.
Y1013
248
Obsolete. WaterFurnace logo; 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.