I've had a 7 series unit running in our new home for 3.5 years now, and I'm pretty happy with it. This morning I noticed that the aux heat had kicked in, which as far as I've noticed is the first time ever. I wandered over to the thermostat to check, and noticed that the system said 0 Watts for the Aux Heat. After a quick internet search I saw that there are CT sensors for the compressor and aux heat - after popping the front cover off the unit I noticed one CT at the top of the wire bundle has no wires through it. So problem solved - almost. When I look at the compressor CT, the wire is not routed straight through it as I would expect, it's doubled back on itself in a way (I will try to get a photo if needed). For the Aux Heat CT can I just route the two black wires the head to the heater strips through the sensor, or is it more complicated than that?