Wiring help - Honeywell Thermostat w/ Carrier Heat Pump
I am trying to replace an old Ruud mercury bulb type thermostat with a new Honeywell digital (Home Depot special). The heat pump is a Carrier 38YXA024032, with FX4ANF030 air handler. The new thermostat is a Honeywell RTH7400D.
Here is how the wires were connected, and how I tried to connect them:
OLD ... NEW
Yellow - Y ... Y
Green - G ... G
Pink - E ... E
Red - R ... R (there is a jumper to Rc on the Honeywell)
Blue - B ... C
Orange - O ... O/B
White - W2 ... Aux
Gray - X ... Not connected
Black - L ... Not connected
The Honeywell thermostat also has an L terminal, with nothing landed on it.
From reading elsewhere, I concluded that the X & L wires were only for indicator lamps on the old thermostat, so were not needed on the new one.
When I switch the system on with the new thermostat, with the system mode set to "Cool", hot air comes out of the vents, I can hear the compressor running, and the outdoor fan is not running (defrost mode??).
1. Am I correct that the X & L wires from the old thermostat are not needed?
2. Is the new thermostat connected properly? If not, how should it be connected?