Coleman Mach AC won't do anything - no fan, no ac

Well, I'm an idiot!

I forgot to plug the outside cord into the top of the popup before raising it. I have yet to go camping with this camper so all the hookup procedures aren't second nature yet. I thought I'd update this thread at the expense of my dignity in hopes that anyone researching the same problem will check the obvious. Thanks for all the help!

Ah. Thought strikes

Normally the 120 volt power lead is one continuous run of Romex from the Breaker box to the A/C (however there is no guarantee)

Now rodents love to chow down on romex but I'm inclined to think not

Two issues I have personally seen.

Bad connection.. A/C end of cable (Where the Romex connects to the Flexible wires in the A/C) they often use wire nuts and ... Not the best connectors.

Check for any evidence of arcing or burning NOTE THIS can trip breakers both on the RV's breaker box and the outlet feeding the RV.

Other thing I've seen.. Joke. sort of. many RVers have a few screws loose.

When my rig was New (less than 1 year) I had major A/C issues. Sometimes one worked, Sometimes the other.. both or none.. Ok so I started at the breaker panel.. Noticed when I was pokeing around (Safely.. I'm trained in that kind of thing) wires MOVING in the clamps.. Uh. That's not right.

one screw took a full 3 1/2 turns before I was happy Others took over 2 full turns) Yup they stuck the wire in but never tightened it down.

We’re all rooting for ya :)

Could you have flipped the hot and neutral wires when you added the 30amp circuit? Do you have one of these testers you can use to verify the wiring?
Link

Try this,

https://www.youtube.com/watch?v=VSgIk8S_i-c

3 tons

mikec35 wrote:
I flipped the breaker on and off but have not put a meter to it. That is my next to do... I am bouncing in and out to work on this thing between work calls today. The 12v portion of the unit is what I am curious of. I am not sure how that works. The unit has a built in thermostat, not a separate wall thermostat. Does the fan itself operate off 12 volts?

Sorry, I stand corrected, I just checked my Coleman Mach 1 and the fan will not operate without 120v…

There should be a Molex style connector at the control knob and a wirenut type splice. Check pins in connector to ensure they have not slide back and not making connection.
I am still thinking circuit breaker not completely tripped. Turn off all breakers applying light pressure toward off. Then turn on main breaker, if equipped, followed by other breakers one at a time.

I flipped the breaker on and off but have not put a meter to it. That is my next to do... I am bouncing in and out to work on this thing between work calls today. The 12v portion of the unit is what I am curious of. I am not sure how that works. The unit has a built in thermostat, not a separate wall thermostat. Does the fan itself operate off 12 volts?

mikec35 wrote:
Is there anything inline between the breaker and the AC unit?

No, have you checked at the breaker??

Upon re-read, you say the fan won’t come on, yet I believe the fan portion is 12v?…This should tell us something…

3 tons

Thanks for the replies. I pulled the control panel down from the ceiling and I do not have 120 volts to the control panel. Is there anything inline between the breaker and the AC unit?