Filter
Top Products
T874 MULTISTAGE THERMOSTATS AND Q674 SUBBASES
60-2485—882
Q674K
S
y
stem: OFF-HEAT-AUTO-COOL; Fan: None
K1000 93 Obsolete. Carrier part no. HH93AZ172; RC-RH
j
umper. Q674E1049 Fan switch is not operational.
K1018 95 Obsolete. Oneida Heater part no. 3040284-02;
S
y
stem: OFF-WOOD-WOOD/OIL-OIL; used with
T874F1106.
Q674K1026
K1026 95 S
y
stem: OFF-WOOD-WOOD/ OIL-OIL; used with
T874F1155.
Q674K1026
K1034 93 Obsolete
. Sn
y
der General part no. 4ELN-7920. Q674E1049 Fan switch is not operational.
K1042 93 Obsolete
. Carrier part no. HH93AZ172-W;
g
ra
y
color;
includes removable
j
umper between RC and RH
terminals.
Q674E1049 Fan switch is not operational.
Q674L
S
y
stem: EM.HT.-HEAT-OFF-COOL; Fan: ON-AUTO
L1017 101 Obsolete
. York heat pump; EM HEAT LED; coolin
g
mode chan
g
eover; compressor lockout; auto fan in
EM.HT; used with T874R1046.
Y594R1243
a
Wirin
g
differences
(
old=new
)
:
W=W2, X=L, B=X.
L1025 102 Obsolete
. Lennox heat pump; part no. 24F6101; EM.
HEAT LED; V-VR
j
umper; used with T874R1020,
J1038.
Y594R1243
a
Wirin
g
differences
(
old=new
)
:
M=Y, F=G, V-VR=VR, Y=W2,
R=O.
L1033 115 Obsolete
. Rheem heat pump; EM HEAT LED; used
with T874R1152.
Y594R1243
a
L1041 103 Obsolete. Carrier heat pump; part no. HH93AZ175;
SUPL HEAT LED; used with T874G1055
(
HH07AT171
)
, G1071
(
HH93AZ175
)
, G1113.
Y594G1419 Wirin
g
differences
(
old=new
)
:
C=X,
j
umper Y1=W1.
L1066 122 Obsolete
. Fedders heat pump; used with T874R1269;
used in Y594R1037.
Y594R1615
a
Wirin
g
differences
(
old=new
)
:
K=E, C=X, W1=B, Z=L.
L1074 124 Obsolete
. Carrier heat pump; part no. HH93AZ186;
SUPL HT LED; used with T874J1002
(
HH07AT175
)
or
T874J1028
(
HH07AT165
)
.
Y594J1001
L1082 104 Obsolete. Crispaire heat pump; W2-H
j
umper; EM
HEAT LED; used with T874R1061, R1111.
Y594R1243
a
Replacement has auto fan in
emer
g
enc
y
heat mode.
L1090 105 Obsolete. Fedders heat pump; EM HEAT LED;
chan
g
eover in heat mode; used with T874C1398,
C1406, C1414.
Y594R1425
a
Wirin
g
differences
(
old=new
)
:
K=E, C=X.
L1108 106 Obsolete
. Westin
g
house; EM HEAT LED.
Y594R1243
a
L1116 107 Obsolete. Carrier part no. HH93AZ171; SUPL HEAT
LED; used with T874D1264
(
HH07AT173
)
.
See OEM for
replacement.
L1132 108 Heil Quaker part no. HQ711598; used with T874R1137,
R1673, R1731, R1749, R1814; used in Y594R1110,
R1466, R1524, R1532, R1607.
Y594R1292
a
L1140 109 Obsolete. Includes EM HEAT and AUX HEAT LEDs;
used with T874R1053; used in Y594G1136.
Y594R1763
a
Desi
g
ned for use on Trane
heat pumps.
L1157 115 Obsolete
. Rheem part no. 41-20796-14; EM HEAT and
AUX HEAT LEDs; used with T874R.
Q674L1207
a
121 Obsolete. Used with T874C.
Y594C1322
a
123 Obsolete. Used with T874R.
Y594R1243
a
L1165 110 Obsolete. Lennox no. 24F5901; factor
y
installed V-VR
j
umper; EM HEAT and SERVICE LEDs; sta
g
e 2 heat is
isolated; used with T874C1448, R1178 and
C815A1013.
Y594R1763
a
Wirin
g
differences
(
old=new
)
:
V-VR=R, M=Y, F=G, X=B,
Y=W, A=T, R=O, E=X2.
L1173 112 Obsolete
. Westin
g
house; AUX HEAT and EM HEAT
LEDs.
Y594R1243
a
Table 9. Q674 Subbase Cross Reference.
Model
Number
Fig.
No. Description
Q674 Trade
Replacement Remarks
a
Both the thermostat and subbase must be replaced.