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T874 MULTISTAGE THERMOSTATS AND Q674 SUBBASES
51 60-2485—8
C1489 121 Obsolete. Honeywell logo; non-adjustable range stops
set at 75°F (max. heat and min. cool) (24°C); used with
Q674L1157.
Y594C1322
a
C1497 121 Obsolete. Honeywell logo; meets DoD specifications;
used with Q674L1157.
Y594C1322
a
C1513 44 Obsolete. Borg-Warner multi-logo; part no.
6TH11703124A.
T874C1018
C1562 44 Obsolete
. Honeywell logo; Heil Quaker part no.
HQ712001HW.
T874C1018
C1570 45 Obsolete
. Williamson logo; used with Q674B1000; used
in Y594C1280.
T874C1018
C1638 121 Obsolete
. Honeywell logo; meets DoD specifications;
includes Allen wrench and screws to lock cover; no
thermometer; non-adjustable range stops set at 72°F
(max. heat) and 78°F (min. cool) (22-26°C); field
adjustable locking levers; used with Q674L1561; used in
Y594C1322.
Y594C1322
a
C1653 70 Obsolete. Fiberglas Canada; °C scaleplate; no H1, H2,
or C1 anticipation; used with Q674S1000; used in
Y594C1348.
See OEM for
replacement.
C1661 99 Obsolete. McQuay logo; part no. 61202401; °F/°C
scaleplate; includes momentary system switch position
with spring release; used with Q674C1363.
T874C1125/
Q674B1075
a
Replacement has HEAT-OFF-
COOL system switching; no
momentary system switch
position; no LEDs.
C1695 45 Obsolete
. Miller logo; used with Q674B1000; used in
Y594C1355.
T874C1018
C1703 45 Obsolete
. Intertherm logo; used with Q674B1000; used
in Y594C1363.
T874C1018
C1737 44 Obsolete
. Honeywell logo; Carrier part no. HH621603. T874C1018
C1745 44 Obsolete
. AAF/Snyder General logo; part no.
4ELN7919.
T874C1018
C1752 219 Obsolete
. McQuay/Snyder General logo; part no.
061202402; 12°F offset between H1 and H2; °F/°C
scaleplate; no C1 anticipation; used with Q674C1363.
T8611M2025
C1760 44 Bard logo. T874C1018
C1778 219 Obsolete
. AAF/Snyder General logo; part no.
066804405; 12°F offset between H1 and H2; °F/°C
scaleplate; no C1 anticipation; used with Q674C1363.
See OEM for
replacement.
C1794 53 Obsolete
. Carrier logo; Canada; part no. HH07AT160-W;
Premier White® color; °C scaleplate; includes locking
cover.
T874C1018 Set stage 1 heat anticipator for
total current draw of fan and
stage 1 heat primary.
C1802 246 Obsolete. California Economizer logo; °F/°C scaleplate;
used with Q674G1005; used in Y594C1371.
T874C1018
C1810 237 Obsolete
. Honeywell logo; TRADELINE model; Premier
White® color; used with Q674B1547; used in
Y594C1389.
Y594C1389
C1844 238 Energy Night logo; used with Q674F1592; used in
Y594C1413.
Y594R1425 Jumper E-W2; system switch:
EM.HT.-HEAT-OFF-COOL.
C1851 60 Obsolete
. Whalen logo. T874C1018
C1869 219 McQuay logo; part no. 0073318801 Premier White®
color; °F/°C scaleplate.
See OEM for
replacement.
Table 8. T874 Cross Reference.
Model
Number
Fig.
No. Description
Trade Model
Replacement Remarks
a
Both the thermostat and subbase must be replaced.