Just wondering if there was some help out there for a heating problem. Done a thermostat
change,went from a T874R 1046 TO A Honeywell digital RTH3100C,Cooling and fan works great,problem is,heating part will only run for a few minutes,it's a YORK heat pump unit all elec.This is my wiring at the unit...
RED-R
YELLOW-Y
GREEN-G
BROWN-W2
WHITE-W1
ORANGE-O
BLUE-C
OLD THERMOSTAT WIRING.. T874R 1046BASE
W-WHITE
B-BROWN
G-GREEN
R-RED
X-N.C.
H-N.C.
O-ORANGE
Y-YELLOW
T-N.C.
NEW RTH3100C THERMOSTAT
E-BROWN
AUX-WHITE
Y-YELLOW
G-GREEN
O-ORANGE
L-N.C.
R-RED
B-N.C.
C-BLUE
Did find a setup in the guide for auxiliary,emergency,and temp setting have that set right..
Still heat will not stay on long.. Can anyone help me PLEASE... THANKS..

Here is a copy of your old thermostat wiring diagram. Now that you have both the old and new that came with your new thermostat it shpould be a snap to wire. If unsure always tract the colored wire back to the unit ans see where it goes.

http://customer.honeywell.com/techlit/pdf/69-0000s/69-0392.pdf