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T874 MULTISTAGE THERMOSTATS AND Q674 SUBBASES
60-2485—886
L1850 120 York Canada;
g
ra
y
color; includes one LED; used with
T874R1970; used in Y594R1789.
Y594R1672
a
L1868 125 TRADELINE; includes two LEDs; used with
T874R1988; used in Y594R1797; direct replacement
for Evcon/Coleman Y594R1235
(
T874R1368/
Q674L1421
)
Coleman part no. 3600-368.
Y594R1797
a
L1876 245 Obsolete. Amana part no. 10573902; includes two
LEDs; used with T874R2002; used in Y594R1805.
Y594R1797 Wirin
g
differences
(
old=new
)
:
C/X=X.
L1884 245 Obsolete
. Amana part no. 10573904; includes two
LEDs; used with T874R2010; used in Y594R1813.
Y594R1797 Wirin
g
differences
(
old=new
)
:
C/X=X, W3=W2.
L1892 103 Obsolete
. TRADELINE; S
y
stem: SUPL HT-HEAT-
OFF-COOL; includes one LED; used with T874G2004;
used in Y594G1666; direct replacement for Carrier
Y507J1011
(
T874G1055/Q674L1041
)
Carrier part no.
HH07AT171/HH93AZ175.
Y594G1674 Replacement has auto
chan
g
eover.
L1900 241 Obsolete
. TRADELINE; S
y
stem: SUPL HT-HEAT-
OFF-COOL; includes SUPL HT LED; used with
T874J1069; used in Y594J1001; direct replacement for
Carrier T874J1028/Q674J1068
(
Carrier part no.
HH07AT165/HH93AZ183
)
, Carrier T874J1002/
Q674J1068
(
Carrier part no. HH07AT175/
HH93AZ183
)
.
Y594J1019 Replacement has auto
chan
g
eover.
L1918 125 Obsolete. York lo
g
o; part no. 2TH11703424A; includes
two LEDs; used with T874R2028 in Y594R1821.
Y594R1797
a
L1934 123 Obsolete. Addison lo
g
o; part no. 843-277; includes
three LEDs; used with T874W1106 in Y594W1055.
T8611M2025
Q674N
S
y
stem: OFF-HEAT-COOL-EVAP; Fan: AUTO-ON
N1015 60 Obsolete
. Goettl heat pump; chan
g
eover in heat mode;
evaporative cooler circuit; used with T874C1182.
See OEM for
replacement.
N1023 61 Obsolete
. Si
g
ler heat pump; evaporative cooler circuit;
used with T874C1349.
See OEM for
replacement.
Q674P
S
y
stem: SUPL HT-HEAT-COOL; Fan: AUTO-ON
P1005 126 Obsolete. Carrier heat pump; part no. HH93AZ169;
used with T874G1071
(
HH07AT171
)
.
Y594G1419
a
Wirin
g
differences
(
old=new
)
:
C=X;
j
umper Y1-W1;
replacement has OFF-EM HT-
HEAT-AUTO-COOL s
y
stem
switchin
g
.
Q674Q
S
y
stem: HEAT-OFF-COOL; Fan: LOW-MED-HI-ON
Q1004 59 Obsolete
. McQua
y
special; used with T874A1267. See OEM for
replacement.
Q1012 64 Used with T874A1291. None
Q674R
S
y
stem: OFF-COOL; Fan: LO-HI-CONT
R1003 69 Obsolete
. Carrier part no. HH93AZ190; international
s
y
mbols on fan and switches; used with T874V1008
(
HH07AT177
)
.
See OEM for
replacement.
Q674S
S
y
stem: HEAT-COOL; Fan: None
S1000 70 Obsolete. Fiber
g
las; Canada; SERVICE LED; used
with T874C1653; used in Y594C1348.
See OEM for
replacement.
Q674W
S
y
stem: OFF-ON; Fan: LO-MED-HI
W1006 240 Obsolete. Sn
y
der General part no. 044271801. See OEM for
replacement.
Table 9. Q674 Subbase Cross Reference.
Model
Number
Fig.
No. Description
Q674 Trade
Replacement Remarks
a
Both the thermostat and subbase must be replaced.