T874 MULTISTAGE THERMOSTATS AND Q674 SUBBASES
75 60-2485—8
C1389 205,
176
Obsolete. Command Aire part no. P1099-0021; two
LEDs; used with T874G-H.
None See thermostat description for
replacement information.
C1397 205,
171
Obsolete. Command Aire part no. P1099-0023; used
with T874G-H.
None See thermostat description for
replacement information.
C1413 213 Obsolete. Carrier part no. HH93AZ204; Fan: Lo-Med-
High-On; used with T874L1059.
See OEM for
replacement.
C1439 217 Obsolete. Bard part no. 8404-016; used with
T874N1024.
See OEM for
replacement.
C1454 163 Obsolete. Climate Master part no. AQ5354; two LEDs;
spring return momentary system switch position.
Y594G1393aNo momentary reset switch.
C1462 25 Climate Master Special. Q674C1058 Replacement has no LEDs.
C1470 221 Obsolete. Climate Master part no. RQ5370; used with
T874H1138.
Y594H1012aWiring differences (old=new):
Y1=O, Y2=Y; replacement has
MALFUNCTION LED only.
C1496 74 Obsolete. Carrier part no. HH93AZ213; includes
SERVICE LED; used with T874H1161; used in
Y594H1038.
Y594H1012aWiring differences (old=new):
Y1=O, Y2=Y; L-R jumper
required.
C1504 83 Obsolete. Carrier part no. HH93AZ214; used in Y594. Y594H1012aWiring differences (old=new):
Y1=O, Y2=Y, L=R, R=none; R-
L jumper required; no night
setback.
T8600D2028
(programmable)
Wiring differences (old=new):
Y1=O, Y2=Y, L=R; W-Y
jumper required; night
setback.
C1512 97 Obsolete. Carrier part no. HH93AZ216; System:
Override-Auto-Off; includes two LEDs; used in Y594.
T8600D2028
(programmable)
Wiring differences (old=new):
L=R, W=O; W-Y jumper
required; night setback.
C1520 72 Obsolete. Carrier part no. HH93AZ210; used with
T874D2049; used in Y594D1388.
Q674C1058
C1538 163 Climate Master part no. AQ5354; System: Off-Auto-
Override; includes two LEDs and momentary spring
position.
Y594G1393 No momentary reset switch.
C1546 76,
225
Obsolete. McQuay part no. 060684802; gray color;
includes one LED.
Q674C1058 Replacement has no LEDs;
beige color
C1553 181,
203
Obsolete. McQuay logo; part no. 073319901; includes
one LED.
Q674C1058 Replacement is beige.
C1561 76 McQuay logo; part no. 073319701; includes one LED. See OEM for
replacement.
C1579 99,
100
McQuay logo; part no. 073320001; includes one LED. See OEM for
replacement.
C1595 72 Obsolete. Standard OEM. Q674C1058
Q674D System: None; Fan: None
D1008 55, 66 Obsolete. Used with T874D1082, F1056; used in
Y594D1057.
Q674D1040
D1016 55 Obsolete. Carrier part no. HH93AZ170; RC-RH jumper. Q674D1040 RC-RH jumper required.
D1032 58 Obsolete. Borg-Warner; used with T874G. T874D1165/
Q674D1040a
Wiring differences (old=new):
Y=Y2, O=Y1, W=W2; jumper
W1-Y2 required.
D1040 55 TRADELINE Q674D1040
D1057 55, 66 Obsolete. York part no. 2TB04700424A. Q674D1040
Table 9. Q674 Subbase Cross Reference.
Model
Number
Fig.
No. Description
Q674 Trade
Replacement Remarks
aBoth the thermostat and subbase must be replaced.