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T874 MULTISTAGE THERMOSTATS AND Q674 SUBBASES
60-2485—8
56
D2056
44
Obsolete. ComStat logo; part no. 50056; °F/°C
scaleplate; adjustable interstage on both heating and
cooling; includes locking cover and field-adjustable
locking levers.
T874D1165
Replacement has °F
scaleplate and 2°F fixed
differential in heating and
cooling.
D2064
53
Obsolete. Carrier Weathermaker; part no. HH07AT209;
stage 1 and 2 heat anticipator factory set 0.1A; taupe
color; used with Q674E1445; used in Y594D1412.
T874D1165
Set stage 1 heat anticipator for
total current draw of fan and
stage 1 heat primary.
Replacement is beige.
D2072
53
Obsolete. Carrier Zone Perfect; part no. HH07AT208;
taupe color; used with Q674E1445; used in Y594D1420.
T874D1165
Set stage 1 heat anticipator for
total current draw of fan and
stage 1 heat primary.
Replacement is beige.
D2080
139
Obsolete. Hydroheat logo.
T874D1165/
Q674B1018
a
Replacement system switch:
HEAT-OFF-COOL; no LEDs.
D2098
44
Obsolete. Honeywell logo; °F scaleplate; one setpoint
lever; used with Q674D1008; used in Y594D1438.
T874D1165
Replacement has °F
scaleplate and two setpoint
levers
D2106
44
Obsolete. Honeywell logo; °C scaleplate; one setpoint
lever; used with Q674D1008; used in Y594D1446.
T874D1165
Replacement has °F
scaleplate and two setpoint
levers.
D2114
44
Obsolete. Bard logo; °C scaleplate.
T874D1165
Replacement has °F
scaleplate.
D2122
224,
225
Obsolete. McQuay
T874D2023
Replacement has °C
scaleplate.
T874D1165
Replacement has °F
scaleplate.
D2130
226
Obsolete. McQuay
See OEM for
replacement.
D2148
44
Obsolete. Dry Aire Systems logo; °F/°C scaleplate.
T874D1165
D2155
139
Hydroheat logo; Premier White® color; °F/°C scaleplate;
used with Q674F1634.
T874D1165/
Q674B1018
a
Replacement system switch:
HEAT-OFF-COOL; no LEDs.
D2163
208
Obsolete. Amana logo; part no. P1217501F; °F/°C
scaleplate.
T874D1165
D2171
44
Obsolete. Amana logo; part no. P1217701F; °F/°C
scaleplate.
T874D1942
D2189
44
Armstrong logo; part no. 01142A024; °F/°C scaleplate;
includes Air Ease insert.
T874D1165
D2197
44
Liebert logo; part no. 138968P3; °F/°C scaleplate;
interstage differential between H1 and H2 and between
C1 and C2; includes Allen wrench and screws to lock
cover; field-adjustable locking levers.
T874D1165
D2205
44
Aaon logo; Premier White® color; °F/°C scaleplate.
T874D1165
T874E
0-stage heat, 2-stage cool.
E1008
44
Obsolete. Honeywell logo.
T874E1016
E1016
44
Honeywell logo; TRADELINE model; includes Allen
wrench and screws to lock cover; field-adjustable
locking levers.
T874E1016
E1024
44
Obsolete. Westinghouse logo.
T874E1016
E1032
44
Lennox logo; part no. 13F0901; °F/°C scaleplate.
T874E1016
Replacement has °F
scaleplate.
E1040
72
Obsolete. Trane logo; used with Q674C1009; used in
Y594E1015.
T874E1016
Table 8. T874 Cross Reference.
Model
Number
Fig.
No.
Description
Trade Model
Replacement
Remarks
a
Both the thermostat and subbase must be replaced.