Outside A/C unit turns ON when Fan is switched to ON position. This is a problem because when the thermostat calls for heat it turns ON the Fan which also turns on the A/C unit.
The A/C unit is not a heat pump.
The System consists of a Honeywell 9000 Wifi thromostat, Traine XL1200 A/C unit, and Aprilaire 500 Humidifier. All the wires are connected to like colors except the A/C unit which has a red and white wire from the outside unit connected to Yellow and White in the junction box where all the thermostat wires are connected together. I checked the panel on the air handler, thermostat and humidifier and wires are connected as follows:
Red wire connects to R and Rc
Blue wire connects C
Yellow wire connects to Y
White wire connects to W
Green wire connects to G
The humidifier has 2 more wires connected to the solenoid valve and a jumper from R to H to tap the 24v supply from the air handler.
Where or how do I start to trouble shoot for a short?