T874 MULTISTAGE THERMOSTATS AND Q674 SUBBASES
49 60-2485—8
B1134 222 Obsolete. Carrier S
y
ner
gy
2000 lo
g
o; part no.
HH07AT199; °C scaleplate; used with Q674E1395
(
HH93AZ209
)
.
T874B1019/
Q674E1049a
Wirin
g
differences
(
old=new
)
:
W1=W; RC-RH
j
umper
re
q
uired; replacement has no
LEDs.
T874C 2-sta
g
e heat, 1-sta
g
e cool.
C1000 44, 76 Hone
y
well lo
g
o; used with Q674B1075, C1181; used in
Y594C1058. T874C1018
C1018 60, 61,
81, 92 Hone
y
well lo
g
o; TRADELINE model; includes Allen
wrench and screws to lock cover; used with
Q674C1074.
T874C1018
C1026 44 Obsolete. AAF lo
g
o; °C scaleplate; includes Allen
wrench and screws to lock cover; non-ad
j
ustable ran
g
e
stops set at 23°C
(
max. heat and min. cool
)
(
73°F
)
.
T874C1018 Replacement has °F
scaleplate.
C1034 44 Lennox lo
g
o; part no. 13F0401; °F/°C scaleplate. T874C1018 Replacement has °F
scaleplate.
C1042 44 Obsolete. Westin
g
house lo
g
o; H1 anticipator factor
y
set
at.75A; H2 anticipator factor
y
set at 1.2A; used with
Q674A-E,G.
T874C1018
C1059 44, 142 Obsolete. Amana Air Conditionin
g
lo
g
o; part no.
D68535-2; H1 anticipator factor
y
set at 1.2A; used with
Q674E1056, Q674B1059, Q674F1022; used in
Y594C1009, Y594C1017, Y594C1256, Y594C1330.
T874C1018
C1067 44 Obsolete. Sears lo
g
o; part no. 42. 9297; °F/°C
scaleplate. T874C1018 Replacement has °F
scaleplate.
C1075 51, 53 Carrier lo
g
o; part no. HH07AT170; used with
Q674B1166. Y594C1421 or
T874C1018a
When usin
g
the T874C1018,
set sta
g
e 1 heat anticipator for
total current draw of fan and
sta
g
e 1 heat primar
y
.
C1083 44 Obsolete. Trane lo
g
o; used with Q674E1007; used in
Y594C1082. T874C1018
C1117 44 Hon e
y
well lo
g
o; °C scaleplate. T874C1018 Replacement has °F
scaleplate.
C1125 60, 61,
92 Obsolete. Hone
y
well lo
g
o; 12°F
(
6.7°C
)
differential
between sta
g
e 1 heat and sta
g
e 2 heat; used with
Q674G1047.
T8611M2025
C1133 96 Obsolete. AAF/Sn
y
der General lo
g
o; part no.
4ELN7546; no H1 heat anticipation; used with Q674A-
G,N and Q674C1173.
T874C1018 Must have H1 anticipator set
to maximum value.
C1141 44 Obsolete. Hone
y
well lo
g
o; meets DoD specs; includes
Allen wrench and screws to lock cover; no thermometer;
non-ad
j
ustable ran
g
e stops set at 72°F
(
max. heat
)
and
78°F
(
min. cool
)
(
22-26°C
)
; field ad
j
ustable lockin
g
levers.
T874C1141
C1158 44 Obsolete. Solaron special. T874C1018
C1166 51, 53 Obsolete. Carrier lo
g
o; part no. HH07AT160; °C
scaleplate; includes Allen wrench and screws to lock
cover; used with Q674B.
T874C1018aReplacement has °F
scaleplate; set sta
g
e 1 heat
anticipator for total current
draw of fan and sta
g
e 1 heat
primar
y
.
C1174 44 Obsolete. Goettl lo
g
o. T874C1018
C1182 60 Obsolete. Goettl lo
g
o; H1 anticipator factor
y
set at 0.8A;
used with Q674N1015. T874C1018
C1190 44 Obsolete. Lennox lo
g
o; part no. 13F0501; °C scaleplate. T874C1018 Replacement has °F
scaleplate.
Table 8. T874 Cross Reference.
Model
Number Fig.
No. Description Trade Model
Replacement Remarks
aBoth the thermostat and subbase must be replaced.