Honeywell T874 Product Data page 86

T874 MULTISTAGE THERMOSTATS AND Q674 SUBBASES
Model Fig.
Number No.
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.
L1876 245 Obsolete. Amana part no. 10573902; includes two
LEDs; used with T874R2002; used in Y594R1805.
L1884 245 Obsolete. Amana part no. 10573904; includes two
LEDs; used with T874R2010; used in Y594R1813.
L1892 103 Obsolete. TRADELINE; System: 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.
L1900 241 Obsolete. TRADELINE; System: 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).
L1918 125 Obsolete. York logo; part no. 2TH11703424A; includes
two LEDs; used with T874R2028 in Y594R1821.
L1934 123 Obsolete. Addison logo; part no. 843-277; includes
three LEDs; used with T874W1106 in Y594W1055.
Q674N System: OFF-HEAT-COOL-EVAP; Fan: AUTO-ON
N1015 60 Obsolete. Goettl heat pump; changeover in heat mode;
evaporative cooler circuit; used with T874C1182.
N1023 61 Obsolete. Sigler heat pump; evaporative cooler circuit;
used with T874C1349.
Q674P System: SUPL HT-HEAT-COOL; Fan: AUTO-ON
P1005 126 Obsolete. Carrier heat pump; part no. HH93AZ169;
used with T874G1071 (HH07AT171).
Q674Q System: HEAT-OFF-COOL; Fan: LOW-MED-HI-ON
Q1004 59 Obsolete. McQuay special; used with T874A1267.
Q1012 64 Used with T874A1291.
Q674R System: OFF-COOL; Fan: LO-HI-CONT
R1003 69 Obsolete. Carrier part no. HH93AZ190; international
symbols on fan and switches; used with T874V1008
(HH07AT177).
Q674S System: HEAT-COOL; Fan: None
S1000 70 Obsolete. Fiberglas; Canada; SERVICE LED; used
with T874C1653; used in Y594C1348.
Q674W System: OFF-ON; Fan: LO-MED-HI
W1006 240 Obsolete. Snyder General part no. 044271801.
a Both the thermostat and subbase must be replaced.
60-2485—8
Table 9. Q674 Subbase Cross Reference.
Description
86
Q674 Trade
Replacement
Y594R1797 a
Y594R1797 Wiring differences (old=new):
C/X=X.
Y594R1797 Wiring differences (old=new):
C/X=X, W3=W2.
Y594G1674 Replacement has auto
changeover.
Y594J1019 Replacement has auto
changeover.
Y594R1797
a
T8611M2025
See OEM for
replacement.
See OEM for
replacement.
Wiring differences (old=new):
Y594G1419
a
C=X; jumper Y1-W1;
replacement has OFF-EM HT-
HEAT-AUTO-COOL system
switching.
See OEM for
replacement.
None
See OEM for
replacement.
See OEM for
replacement.
See OEM for
replacement.
Remarks