Honeywell T874 Product Data page 76

T874 MULTISTAGE THERMOSTATS AND Q674 SUBBASES
Model Fig.
Number No.
D1065 63 Obsolete. Includes two LEDs; used with T874F1122.
D1099 55, 66 Obsolete. Trane part no. BAS-0430; used with T874A-F.
D1107 55, 66 Obsolete. Snyder General part nos. 654958801/
1520503/ 4ELN30070.
D1115 208 Trol-A-Temp; used with T874D1801.
D1123 208 Trol-A-Temp; gray color; used with T874D1827.
D1156 55 Obsolete. Gray color; includes removable jumper
between RC and RH terminals.
D1164 66 Obsolete. Carrier part no. HH93AZ211; used in
Y594D1440.
D1172 208 Obsolete. Amana logo; part no. P121501F; removable
jumpers between RC and RH terminals.
D1180 55 Obsolete. York logo; part no. 2TH04703224A.
D1198 55, 66 Obsolete. Standard OEM.
Q674E System: OFF-HEAT-AUTO-COOL; Fan: AUTO-ON
E1007 82 Used with T874D1504; used in Y594D1180.
E1015 84 Obsolete. Lennox heat pump; used with T874G1006,
G1154.
E1049 193 TRADELINE; used with T874D2031 and TG504A1025;
used in Y594D1354.
E1056 82 Obsolete. Amana part no. D68535-7; used with
T874C1059, C1331; used in Y594C1009.
E1064 83 Obsolete. RC-RH jumpered internally; EM HEAT LED.
E1072 82 Carrier part no. HH93AZ176; RC-RH jumpered
internally.
E1080 82 Trane part no. BAY28X184.
E1098 85 Obsolete. Used with T874A-D.
E1106 185 Obsolete. ITT Nesbitt.
E1114 87 Carrier part no. HH93AZ177; RC-RH jumper;
LOCKOUT LED to indicate compressor lockout; used
with HH07AT series thermostats.
E1122 83 Obsolete. Square D part no. 63600-002-10; CHECK
LED.
E1148 86 Obsolete. Lennox heat pump; used with T874G1014,
G1022.
E1155 88 Obsolete. Lennox part no. 91C7501; HIGH and LOW
LEDs; used with T874B1076, D1017.
E1197 89 Obsolete. McQuay part no. 02005961; two LEDs; used
with T874D1116.
E1205 80 Obsolete. Fedders special; SERVICE LED; used with
T874D1462.
E1213 82 York part no. 2TB04700224A.
E1221 82 Heil Quaker part no. HQ712003HW.
Both the thermostat and subbase must be replaced.
a
60-2485—8
Table 9. Q674 Subbase Cross Reference.
Description
76
Q674 Trade
Replacement
T874F1015/ Replacement has no LEDs.
Q674D1040
a
Q674D1040
Q674F1040.
None See Trol-A-Temp.
None See Trol-A-Temp.
Q674D1040 Replacement is beige color.
Q674D1040
Q674D1040
Q674D1040
T874D1165/ Replacement is beige color.
Q674D1040
Q674E1049
Wiring differences (old=new):
Y594G1252 a
R=O, M=Y, F=G, V=R, Y=W2;
E-W2 jumper required.
Q674E1049
Q674E1049 RC-RH jumper required.
Q674E1049
Q674E1049 RC-RH jumper required.
Q674E1049
Q674E1049 RC-RH jumper required.
See OEM for
replacement.
Q674E1049 RC-RH jumper required;
replacement has no LED.
Q674E1049 Replacement has no LED.
Wiring differences (old=new):
Y594G1252
a
R=O, M=Y, F=G, Y=W2,
V-VR=R; must use single
transformer.
Q674E1049 Replacement has no LEDs.
Q674E1049 Wiring differences (old=new):
D=O; replacement has no
LEDs.
Q674E1049 Replacement has no LEDs.
Q674E1403
Q674E1049
Remarks