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T874 MULTISTAGE THERMOSTATS AND Q674 SUBBASES
37 60-2485—8
N1010 Williamson logo; adjustable anticipator stage 1 and
2 heat; fixed anticipator stage 1 cool; used with
Q672F1133 or F1315.
T874N1016/
Q674F1220
N1028 TRADELINE heat mode changeover; used with
Q672F1216.
T874N1016
N1036 Bard; used with Q672F1299. T874N1016/
Q674F1220
N1044 Thermotron logo; 1st stage changeover heat
mode; used with Q672F1299.
T874N1016/
Q674F1220
T872Q 1-stage heat; used with another T872 for heating
setback.
Q1009 Standard OEM T874C1125
Q1017 York logo T874C1125 Replacement only good for
1-stage heat and 1-stage cool
applications.
Q1025 ITT logo None
Q1033 Lennox logo; no. P-8-8899. None
Q1041 Lennox logo; no. 63A6401. None
T872R Heat pump model; 2-stage heat, 1-stage cool,
manual changeover.
R1008 Fixed anticipator stage 1 heat and cool; no
anticipator stage 2 heat; changeover with cooling;
used with Q672B1046.
Y594R1425 Wiring differences (old=new):
W=W2; W1-Y1 jumper required.
R1016 Addison same as T872R1008; used with
Q672B1103.
Y594R1425 Wiring differences (old=new):
W=W2; W1-Y1 jumper required.
R1024 Lennox logo; fast cycle stage 2 heat; fixed
anticipator stage 1 heat and cool; changeover with
cooling; used with Q672B1160 and Q672L1003.
See subbase description for
replacement information.
R1032 York logo; fixed anticipator stage 1 and 2 heat and
stage 1 cool; changeover with cooling; used with
Q672L1011.
Y594R1664
R1040 Lennox logo; fast cycle stage 2 heat; fixed
anticipator stage 1 heat and cool; isolated stage 2
heat switch; changeover with cooling; used with
Q672B1202 no. P-8-11221, Q672L1029
See subbase description for
replacement information.
R1057 TRADELINE; fixed anticipator stage 1 heat and
cool; no anticipator stage 2 heat; changeover on
cooling; used with Q672L1037; outdoor reset.
Y594R1763 Designed for use on General
Electric heat pumps. Wiring
differences (old=new): A=T.
R1065 Adjustable anticipator stage 2 heat; fixed
anticipator stage 1 heat and cool; changeover on
cooling; used with Q672L1045.
Y594R1243
R1073 Lennox logo; no. 63A0301; Celsius scale;
separate auxiliary heat power circuit; fast cycle
stage 2 heat antic.
None
R1081 Ruud logo; same circuit as T872R1065; used with
Q672L1045, L1136.
Y594R1243
R1099 Dunham Bush special; used with Q672L1060,
L1383.
Y594R1243
R1107 Rheem; no. RXMT-B70; used with Q672L1045,
L1136.
Y594R1243
R1115 Friedrich logo; fixed anticipator; used with
Q672B1244, L1086.
See subbase description for
replacement information.
Table 6. T872-T874 Thermostat Cross Reference.
Model Number Description
T874 Trade
Replacement
a
Remarks
a
When replacing a T872 Thermostat and Q672 Subbase, always replace both the thermostat and the subbase.