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T874 MULTISTAGE THERMOSTATS AND Q674 SUBBASES
60-2485—876
D1065 63 Obsolete. Includes two LEDs; used with T874F1122. T874F1015/
Q674D1040
a
Replacement has no LEDs.
D1099 55, 66 Obsolete
. Trane part no. BAS-0430; used with T874A-F. Q674D1040
D1107 55, 66 Obsolete
. Sn
y
der General part nos. 654958801/
1520503/ 4ELN30070.
Q674F1040.
D1115 208 Trol-A-Temp; used with T874D1801. None See Trol-A-Temp.
D1123 208 Trol-A-Temp;
g
ra
y
color; used with T874D1827. None See Trol-A-Temp.
D1156 55 Obsolete. Gra
y
color; includes removable
j
umper
between RC and RH terminals.
Q674D1040 Replacement is bei
g
e color.
D1164 66 Obsolete
. Carrier part no. HH93AZ211; used in
Y594D1440.
Q674D1040
D1172 208 Obsolete
. Amana lo
g
o; part no. P121501F; removable
j
umpers between RC and RH terminals.
Q674D1040
D1180 55 Obsolete
. York lo
g
o; part no. 2TH04703224A. Q674D1040
D1198 55, 66 Obsolete
. Standard OEM. T874D1165/
Q674D1040
Replacement is bei
g
e color.
Q674E
S
y
stem: OFF-HEAT-AUTO-COOL; Fan: AUTO-ON
E1007 82 Used with T874D1504; used in Y594D1180. Q674E1049
E1015 84 Obsolete. Lennox heat pump; used with T874G1006,
G1154.
Y594G1252
a
Wirin
g
differences
(
old=new
)
:
R=O, M=Y, F=G, V=R, Y=W2;
E-W2
j
umper re
q
uired.
E1049 193 TRADELINE; used with T874D2031 and TG504A1025;
used in Y594D1354.
Q674E1049
E1056 82 Obsolete
. Amana part no. D68535-7; used with
T874C1059, C1331; used in Y594C1009.
Q674E1049 RC-RH
j
umper re
q
uired.
E1064 83 Obsolete
. RC-RH
j
umpered internall
y
; EM HEAT LED. Q674E1049
E1072 82 Carrier part no. HH93AZ176; RC-RH
j
umpered
internall
y
.
Q674E1049 RC-RH
j
umper re
q
uired.
E1080 82 Trane part no. BAY28X184. Q674E1049
E1098 85 Obsolete
. Used with T874A-D. Q674E1049 RC-RH
j
umper re
q
uired.
E1106 185 Obsolete. ITT Nesbitt. See OEM for
replacement.
E1114 87 Carrier part no. HH93AZ177; RC-RH
j
umper;
LOCKOUT LED to indicate compressor lockout; used
with HH07AT series thermostats.
Q674E1049 RC-RH
j
umper re
q
uired;
replacement has no LED.
E1122 83 Obsolete
. S
q
uare D part no. 63600-002-10; CHECK
LED.
Q674E1049 Replacement has no LED.
E1148 86 Obsolete
. Lennox heat pump; used with T874G1014,
G1022.
Y594G1252
a
Wirin
g
differences
(
old=new
)
:
R=O, M=Y, F=G, Y=W2,
V-VR=R; must use sin
g
le
transformer.
E1155 88 Obsolete
. Lennox part no. 91C7501; HIGH and LOW
LEDs; used with T874B1076, D1017.
Q674E1049 Replacement has no LEDs.
E1197 89 Obsolete
. McQua
y
part no. 02005961; two LEDs; used
with T874D1116.
Q674E1049 Wirin
g
differences
(
old=new
)
:
D=O; replacement has no
LEDs.
E1205 80 Obsolete
. Fedders special; SERVICE LED; used with
T874D1462.
Q674E1049 Replacement has no LEDs.
E1213 82 York part no. 2TB04700224A. Q674E1403
E1221 82 Heil Quaker part no. HQ712003HW. Q674E1049
Table 9. Q674 Subbase Cross Reference.
Model
Number
Fig.
No. Description
Q674 Trade
Replacement Remarks
a
Both the thermostat and subbase must be replaced.