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netsirk's avatar
netsirk
Explorer
Jul 22, 2025

Help with coleman mach 3 wiring in 2003 fleetwood tioga

I need help reconnecting my thermostat to the wiring in the wall...I was going to replace the thermostat and disconnected the old one..I took a picture before disconnecting the wires but since then I guess the picture was deleted cause I cannot find it anywhere. I'm not trying to install a new thermostat anymore, I just want to put the old one back on and get the A/C on asap! 

I have a 2003 Fleetwood Tioga with a Coleman Mach 3 A/C

The 7 wires coming out of the wall which come from the unit on the roof are different colors than the 6 wires that go into the thermostat and im unsure of which colors to attach together (this is what the picture was of)

The wires coming from the roof are:

  1. green
  2. gray
  3. yellow
  4. Blue
  5. black
  6. black w/ white stripe  
  7. blue w/ white stripe 

And the colors going into the thermostat are:

  1. Green
  2. Gray
  3. Yellow
  4. Blue
  5. Red
  6. White

Everything worked perfectly before it was disconnected.

I've searched and searched the Internet and found very little of anything that helps at all. I have some wiring diagrams but I don't understand how to read them. Please help!

2 Replies

  • Can't help with your thermostat. But have you checked your phone for recently deleted items? Both Android and iPhone don't actually delete the photos but move them to a recently deleted folder. A quick internet search should help you find that folder and recover the photos.

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