Honeywell T874 - page 85

T874 MULTISTAGE THERMOSTATS AND Q674 SUBBASES
85 60-2485—8
L1678 209 Trol-A-Temp by Honeywell; gray color; used with
T874R1707; used in Y594R1490.
None See Trol-A-Temp.
L1686 209 Trol-A-Temp by Honeywell; used with T874R1715;
used in Y594R1508.
None See Trol-A-Temp.
L1702 132 Obsolete. Snyder General heat pump; part no.
654958B07; used with T874R1723 and C815A1005;
used in Y594R1516.
Y594R1672aWiring differences (old=new):
C=B, W1=W, X=X2.
L1710 230 Used with T874R1822; used in Y594R1615. Y594R1615a
L1728 228 Obsolete. Lennox; gray color; used with T874R1855;
used in Y594R1714.
Y594R1763aWiring differences (old=new):
Y1=Y, L=F, W1=W, E=X2, C=B.
L1736 120 Designed to replace Y594R1011 (York part no.
2TH11702224); used with T874R1871; used in
Y594R1664.
Y594R1664a
Designed 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 Gray color; used with T874R1897, used in
Y594R1680.
Y594R1680a
L1769 124 Obsolete. Nordyne part no. 9132260; used with T874J. See OEM for
replacement.
L1777 120 Obsolete. Gray color; designed 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 beige.
Designed to replace Y594R1011 (York part no.
2TH11702224); used with T874R1913; used in
Y594R1706.
Y594R1664aReplacement is beige.
L1785 103 Obsolete. Carrier part no. HH93AZ175-W; Canada;
gray color; System: Supl Ht-Heat-Off-Cool; includes
one LED.
Y594G1476aWiring differences (old=new):
C=X; Y1-W1 jumper required.
L1793 124 Obsolete. Carrier Canada part no. HH93AZ186-W;
gray color; Fan: Auto-On; System: 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.
Y594R1763a
L1819 168 Obsolete. Inter-City 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-City Products; includes three LEDs;
used in Y594W1030.
T8611M2025a
(programmable)
Includes night setback.
L1843 115 Obsolete. Consolidated Industries part no. 9036100;
gray color; includes two LEDs; used with T874R1962;
used in Y594R1771.
Y594R1680aIncludes CHECK LED.
L1850 120 York Canada; gray color; includes one LED; used with
T874R1970; used in Y594R1789.
Y594R1672a
Table 9. Q674 Subbase Cross Reference.
Model
Number
Fig.
No. Description
Q674 Trade
Replacement Remarks
aBoth the thermostat and subbase must be replaced.