labarca
Jun 26, 2010, 06:47 PM
I wanted to replaced my old thermostat but I los truck of the wiers color and numbers
hvac1000
Jun 26, 2010, 08:30 PM
Red= transformer 24 volts
Yellow= contactor for A/C unit outside
Green= fan
white=heat
heat pump only add
blue= reversing valve energized in heating.
Orange=reversing valve energized in cooling