T874 MULTISTAGE THERMOSTATS AND Q674 SUBBASES
85 60-2485—8
L1637 207 Obsolete. Carrier heat pump; part no. HH93AZ195;
used with T874J1002
(
HH07AT175
)
or T874J1010
(
HH07AT165
)
.
Y594J1001a
L1678 209 Trol-A-Temp b
y
Hone
y
well;
g
ra
y
color; used with
T874R1707; used in Y594R1490. None See Trol-A-Temp.
L1686 209 Trol-A-Temp b
y
Hone
y
well; used with T874R1715;
used in Y594R1508. None See Trol-A-Temp.
L1702 132 Obsolete. Sn
y
der General heat pump; part no.
654958B07; used with T874R1723 and C815A1005;
used in Y594R1516.
Y594R1672aWirin
g
differences
(
old=new
)
:
C=B, W1=W, X=X2.
L1710 230 Used with T874R1822; used in Y594R1615. Y594R1615a
L1728 228 Obsolete. Lennox;
g
ra
y
color; used with T874R1855;
used in Y594R1714. Y594R1763aWirin
g
differences
(
old=new
)
:
Y1=Y, L=F, W1=W, E=X2, C=B.
L1736 120 Desi
g
ned to replace Y594R1011
(
York part no.
2TH11702224
)
; used with T874R1871; used in
Y594R1664.
Y594R1664a
Desi
g
ned to replace Y594R1151
(
York part no.
2TH11702324
)
, Y594R1193
(
York part no.
6TH11702224
)
and York part no. 2TH11704024; used
with T874R1889 and C815A1054; used in Y594R1672.
Y594R1672a
L1751 230 Gra
y
color; used with T874R1897, used in
Y594R1680. Y594R1680a
L1769 124 Obsolete. Nord
y
ne part no. 9132260; used with T874J. See OEM for
replacement.
L1777 120 Obsolete. Gra
y
color; desi
g
ned to replace Y594R1151
(
York part no. 2TH11702324
)
, Y594R1193
(
York part
no. 6TH11702224
)
and York part no. 2TH11704024;
used with T874R1905 and C815A1059; used in
Y594R1698.
Y594R1672aReplacement is bei
g
e.
Desi
g
ned to replace Y594R1011
(
York part no.
2TH11702224
)
; used with T874R1913; used in
Y594R1706.
Y594R1664aReplacement is bei
g
e.
L1785 103 Obsolete. Carrier part no. HH93AZ175-W; Canada;
g
ra
y
color; S
y
stem: Supl Ht-Heat-Off-Cool; includes
one LED.
Y594G1476aWirin
g
differences
(
old=new
)
:
C=X; Y1-W1
j
umper re
q
uired.
L1793 124 Obsolete. Carrier Canada part no. HH93AZ186-W;
g
ra
y
color; Fan: Auto-On; S
y
stem: Supl Ht-Heat-Off-
Cool; includes one LED.
Y594J1019a
L1801 197 American Standard
(
Trane
)
part no. THT1225; includes
two LEDs; used with T874R1939; used in Y594R1748. Y594R1763 a
L1819 168 Obsolete. Inter-Cit
y
Products part no. HQ1149407HW;
includes three LEDs; used with T874R1947; used in
Y594R1755.
Y594R1425a
L1827 197 TRADELINE; includes two LEDs; used with
T874R1954; used in Y594R1763; direct replacement
for Trane/American Standard Y594R1748
(
T874R1939/Q674L1801
)
Trane part no. ASYSTAT
631A, Y594R1136
(
T874R1053/Q674L1140
)
.
Y594R1763a
L1835 140 Obsolete. Inter-Cit
y
Products; includes three LEDs;
used in Y594W1030. T8611M2025a
(
pro
g
rammable
)
Includes ni
g
ht setback.
L1843 115 Obsolete. Consolidated Industries part no. 9036100;
g
ra
y
color; includes two LEDs; used with T874R1962;
used in Y594R1771.
Y594R1680aIncludes CHECK LED.
Table 9. Q674 Subbase Cross Reference.
Model
Number Fig.
No. Description Q674 Trade
Replacement Remarks
aBoth the thermostat and subbase must be repl aced.