Thermostat RTH3100C
#1
11-26-07, 08:30 PM
Join Date: Nov 2007
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Thermostat RTH3100C
Changed out old thermostat T874R with new digital RTH3100C
honeywell.
T874R WIRING DIGITAL RTH3100C WIRING
W-WHITE E-LIGHT BROWN
B-BROWN AUX-WHITE
G-GREEN Y-YELLOW
R-RED G-GREEN
X-N.C. O-ORANGE
H-N.C. L-N.C.
O-ORANGE R-RED
Y-YELLOW B-N.C.
T-N.C. C-BLUE
Heat will not stay on very long, cycle on and off,temp will not raise when you call for more heat..is it a wiring problem??
honeywell.
T874R WIRING DIGITAL RTH3100C WIRING
W-WHITE E-LIGHT BROWN
B-BROWN AUX-WHITE
G-GREEN Y-YELLOW
R-RED G-GREEN
X-N.C. O-ORANGE
H-N.C. L-N.C.
O-ORANGE R-RED
Y-YELLOW B-N.C.
T-N.C. C-BLUE
Heat will not stay on very long, cycle on and off,temp will not raise when you call for more heat..is it a wiring problem??
#2
11-27-07, 08:26 PM
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Join Date: Sep 2001
Location: Rochester, Minnesota
Posts: 18,427
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I am not clear on what you are trying to show?
do you mean on the old T874R hook up was,
B-Brown
G-Green
R-Red
X- N.C? (No wire?)
H- N.C
O- Orange
Y- Yellow
t-
and on the new RTH3100C,
E- Light brown
Aux-White
Y-Yellow
G- Green
O- orange
L-
R-Red
B-
C-Blue
What is the make and model of the furnace (or air handler?)
and outdoor unit?
T874R WIRING DIGITAL RTH3100C WIRING
W-WHITE E-LIGHT BROWN
B-BROWN AUX-WHITE
G-GREEN Y-YELLOW
R-RED G-GREEN
X-N.C. O-ORANGE
H-N.C. L-N.C.
O-ORANGE R-RED
Y-YELLOW B-N.C.
T-N.C. C-BLUE
W-WHITE E-LIGHT BROWN
B-BROWN AUX-WHITE
G-GREEN Y-YELLOW
R-RED G-GREEN
X-N.C. O-ORANGE
H-N.C. L-N.C.
O-ORANGE R-RED
Y-YELLOW B-N.C.
T-N.C. C-BLUE
B-Brown
G-Green
R-Red
X- N.C? (No wire?)
H- N.C
O- Orange
Y- Yellow
t-
and on the new RTH3100C,
E- Light brown
Aux-White
Y-Yellow
G- Green
O- orange
L-
R-Red
B-
C-Blue
What is the make and model of the furnace (or air handler?)
and outdoor unit?
