Air Conditioner: Where does the mystery wire go?

[Radio]

Opened up the filter grill on a Dometic 13.5 ducted air conditioner and happened to notice this little orange wire sticking out by itself. All the other wires have mates, blue to blue, brown to brown so on, although the mating wires are not always the same color.

There is no orange wire for it to mate to. There is no other wire of any color that does not have a mate. The little wires seem to be in a bundle or cable.

The A/C works fine.

The furnace has never worked right. For the furnace to come on an run one heat cycle a switch on the side of the furnace must be cycled on and off.

Maybe this is the problem? Where does the orange wire go?

[B and B]

What ever you do... Don't cut the blue wire!!

[Radio]

So, we are collectively stumped? Nobody knows where the orange wire goes?

It may not go anywhere...

[Radio]

So, we are still collectively stumped?

Nobody knows where the orange wire goes? Not even a guess?

[whatsupchuck]

My guess would be it goes to the furnace control and must be missing. First trip with our new Open Range the furnace did not work as wiring was not properly crimped at the main A/C unit controlled by the thermostat. I never thought to look there, but, paid for service call and the guy went straight to it. We also found poor crimps feeding the control board on the furnace.

Try to get a wiring diagram of the trailer, A/C unit and the furnace and you might find what is missing.

Ain't it fun to be a Hack of all trades?

[Flybob]

Might be for the addition of a heat strip