Coleman Airxcel thermostat and controller box installation

A1RVTraveler wrote:
The blue wire from the thermostat goes to ground anywhere on the RV and also must be connected to the (B-) wire on the control box.

It appears option 2 is the best in my case, but I am not sure where is the red wire that you've mentioned, except the orange wire...and I am not even sure that I am looking at the right part.
Please see the attached photos.
Thanks much again
Nick
BTW: I measure with a voltmeter, and I can't get a 12vdc anywhere.:M

The blue wire from the thermostat goes to ground anywhere on the RV and also must be connected to the (B-) wire on the control box.

A1RVTraveler wrote:
As a repairman, I run into this issue every time someone wants to change from ceiling controls to a wall thermostat.

You have to run a 12VDC wire from somewhere.

These options come to mind.

1. Run a 12V wire from a source near the new thermostat location. You might be able to use a light source. Just make sure you use 12V that comes to the light switch, not the 12V leaving the light switch to the light.

2. Run 12V from the furnace to the thermostat. Tap into the red furnace wire.

3. Run a new 12V line from the fuse panel.

4. I have added a 120VAC Duplex box (THINK WALL OUTLET IN HOUSE) in the ceiling assembly area. Use the 120VAC coming to the new Control box. Just splice it in series prior to the control box. You can now buy an 120VAC to 12DC adapter (Radio Shack) Plug the adapter into the Duplex box and then you have a new 12VDC source. Since you have to run a bunch of wires from the Control Box down to the thermostat, you can run one more wire for the 12V to the thermostat.

Hope this helps.

Thanks a million for the jnfo.

Options

1. I have no idea, as I don't have any 12vdc light in my trailer.
2. I wjll have study on this one.
3. Not an option in my case
4. If i can find a 12vdc source then I can run to the thermostat, but I have only 1 wire (red) left from the thermostat. Do i need a ground wire, too?

Thanks again

As a repairman, I run into this issue every time someone wants to change from ceiling controls to a wall thermostat.

You have to run a 12VDC wire from somewhere.

These options come to mind.

1. Run a 12V wire from a source near the new thermostat location. You might be able to use a light source. Just make sure you use 12V that comes to the light switch, not the 12V leaving the light switch to the light.

2. Run 12V from the furnace to the thermostat. Tap into the red furnace wire.

3. Run a new 12V line from the fuse panel.

4. I have added a 120VAC Duplex box (THINK WALL OUTLET IN HOUSE) in the ceiling assembly area. Use the 120VAC coming to the new Control box. Just splice it in series prior to the control box. You can now buy an 120VAC to 12DC adapter (Radio Shack) Plug the adapter into the Duplex box and then you have a new 12VDC source. Since you have to run a bunch of wires from the Control Box down to the thermostat, you can run one more wire for the 12V to the thermostat.

Hope this helps.

StirCrazy wrote:
can you find instalation manuals for both units? maybe if you can you can compare the wiring and see if you can find the common ones.

Steve

I do have the manuals of both units, but no mention of how to wire the red cable (+12vdc) to power the thermostat.

can you find instalation manuals for both units? maybe if you can you can compare the wiring and see if you can find the common ones.

Steve