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T874 MULTISTAGE THERMOSTATS AND Q674 SUBBASES
60-2485—8 62
G1873 160 Obsolete. Honeywell logo; TRADELINE model; Premier
White® color; designed to replace Y594G1013 (York
part no. 2TH11702424), Y594G1229 (York part no.
6TH11702424), and York part no. 2TH117704124); used
with Q674J1225; used in Y594G1575.
Y594G1567
a
Replacement is beige.
G1881 167 Rheem; part no. 41-20797-18.
Y594G1526
a
G1899 169 Obsolete. Amana; part no. 10574101; used with
Q674F1550; used in Y594G1591.
Y594G1633
a
G1915 155 Econar logo; used with Q674F1212; used in
Y594G1609.
Y594G1252
a
170 Used with Q674F1410.
Y594G1393
a
G1923 176 Trane logo; part no. X13510599010; H2 make 12°F
below H1 make.
Y594H1012
a
Wiring differences (old=new):
Y1=O, Y2=Y, R=none; L-R
jumper required; no night
setback.
T8611G1004
(programmable)
Includes night setback.
G1931 155,
170
Obsolete
. Honeywell logo; Premier White® color; °C
scaleplate; used with Q674F1568.
None See subbase description for
replacement information.
G1949 73 Obsolete
. Carrier Heat Pump System Control logo; part
no. HH07AT204; °F/°C scaleplate; H2 make 8°F below
H1 make; used in Y594.
Y594H1012
a
Wiring differences (old=new):
Y1=O, Y2=Y, L=R, R=none; R-
L jumper required; no night
setback.
T8600D1004
(programmable)
Wiring differences (old=new):
Y1=O, Y2=Y, L=RH; RC-RH
jumper required; includes
night setback.
G1956 30, 103,
126,
183
Obsolete
. Carrier logo; Canada; Premier White® color;
°C scaleplate; includes locking cover.
Y594G1476 Replacement has °F
scaleplate.
G1964 160 York logo; Canada; Premier White® color; °C scaleplate;
used in Y594G1625.
Y594G1575
a
Replacement has °F
scaleplate.
G1972 169 Honeywell logo; TRADELINE model; used with
Q674F1584; used in Y594G1633.
Y594G1633
a
G1980 169 Obsolete. Amana logo; part no. 10574103; used with
Q674F1600; used in Y594G1641.
Y594G1633
a
Wiring differences (old=new):
W3=W2.
G1998 155 Obsolete
. Tempstar logo (Inter-City Products); used in
Y594G1658; used with Q674F1212.
Y594G1252
a
G2004 103 Honeywell logo; TRADELINE model; used with Q674L;
used in Y594G.
Y594G1666
161 Used with Q674J1274; used in Y594G1674. Y594G1674
G2046 155,
170
WaterFurnace logo; part no. TA21H03; Premier White®
color; °F/°C scaleplate; used with Q674F1667; used in
Y594G1716.
Y594G1716
T874H Heat pump model; 1-stage heat, 1-stage cool,
1-stage changeover in cool.
H1005 74 Obsolete
. Command Aire logo; used with Q674C1041.
Y594H1012
a
Wiring differences (old=new):
Y1=O, Y2=Y; L-R jumper
required.
H1013 74 Obsolete. Friedrich part no. AT5813; °C scaleplate; used
with Q674C1041.
Y594H1012
a
Wiring differences (old=new):
Y1=O, Y2=Y; L-R jumper
required; replacement has °F
scaleplate.
Table 8. T874 Cross Reference.
Model
Number
Fig.
No. Description
Trade Model
Replacement Remarks
a
Both the thermostat and subbase must be replaced.