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T874 MULTISTAGE THERMOSTATS AND Q674 SUBBASES
43 60-2485—8
G1074 Sin
g
er no. 02005754; X1 and X2 terminals for
field-added indicator li
g
hts; used with
T872D1375.
None
G1082 Sin
g
er no. 02005792; X1 and X2 terminals for
field-added indicator li
g
hts; used with
T872D1375.
None
G1090 TRADELINE; B and O terminals. Q674G1070
Q672H
S
y
stem: OFF-ON
Fan: NIGHT INT.-DAY CONT.
H1008 Used with T872. None
Q672J
S
y
stem: EM. HT.-AUTO-OFF
Fan: AUTO-ON.
J1005 With EM. HT. LED; used with T872C or D. None
J1013 Westin
g
house; heat pump; EM. HT. LED; cool
mode chan
g
eover; compressor lockout in
EM. HT.; used with T872G1034.
Y594G1252
J1021 York; heat pump; EM. HT. LED; cool mode
chan
g
eover; compressor lockout and auto fan in
EM. HT.; E-W
j
umper; used with T872G1042,
G1331, G1398.
Y594G1567
J1039 Heat pump; EM. HT. and AUX. HEAT LEDs;
cool mode chan
g
eover; compressor lockout and
auto fan in EM. HT.; used with T872G1059.
Y594G1161 Desi
g
ned for use on General
Electric heat pumps.
J1047 Sin
g
er no. 02005699; heat pump; EM. HT. LED;
heat mode chan
g
eover.
Q674F1022
J1054 Carrier no. HH93AZ073A; heat pump; EM. HT.
LED; cool mode chan
g
eover; compressor
lockout in EM. HT.; used with T872G1075,
G1182, G1307.
Y594G1252 Wirin
g
differences
(
old=new
)
: C=X.
J1062 Westin
g
house; EM. HT. and AUX. HEAT LEDs;
used with T872G1034.
Y594G1252 Wirin
g
differences
(
old=new
)
:
W=W2.
Q672K
S
y
stem: OFF-HEAT-AUTO-COOL. Fan: None.
K1004 Carrier no. HH93AZ072. Q674E1049 Fan switch does not function.
K1012 Oneida Heater no. 30A0288-01; S
y
stem: OFF-
WOOD-WOOD/OIL-OIL; used with T872F1175.
T874F1155/
Q674K1026
Q672L
S
y
stem: EM. HT.-HEAT-OFF-COOL.
Fan: ON-AUTO.
L1003 Lennox; heat pump; EM. HT. LED; cool mode
chan
g
eover; used with T872R1024.
Y594R1425
L1011 York; heat pump; EM. HT. LED; cool mode
chan
g
eover; compressor lockout and auto fan in
EM. HT.; used with T872R1032, R1180, R1297.
Y594R1664
L1029 Lennox no. P-8-11226; heat pump; EM. HT.
LED; V-VR
j
umper; cool mode chan
g
eover;
compressor lockout in EM. HT.; used with
T872R1040.
Y594R1425 Wirin
g
differences
(
old=new
)
:
V-VR=R, M=Y, Y=W2, F=G, R=O.
L1037 Heat pump; EM. HT. and AUX. HT. LEDs; cool
mode chan
g
eover; compressor lockout and auto
fan in EM. HT.; used with T872R1057.
Y594R1763 Wirin
g
differences
(
old=new
)
: A=T;
desi
g
ned for used on General
Electric heat pumps.
L1045 Rheem; heat pump; EM. HT. LED; cool mode
chan
g
eover; compressor lockout in EM. HT.;
auto fan in EM. HT; used with T872R1065,
R1081, R1107.
Y594R1243
Table 7. Q672-Q674 Subbase Cross Reference.
Model Number Description
Q674 Trade
Replacement
a
Remarks
a
When replacin
g
a T872 Thermostat and Q672 Subbase, alwa
y
s replace both the thermostat and subbase.