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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.
Y594G1393
a
No momentary reset switch.
C1462 25 Climate Master Special. Q674C1058 Replacement has no LEDs.
C1470 221 Obsolete. Climate Master part no. RQ5370; used with
T874H1138.
Y594H1012
a
Wiring 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.
Y594H1012
a
Wiring differences (old=new):
Y1=O, Y2=Y; L-R jumper
required.
C1504 83 Obsolete
. Carrier part no. HH93AZ214; used in Y594.
Y594H1012
a
Wiring 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/
Q674D1040
a
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
a
Both the thermostat and subbase must be replaced.