Forum Discussion

wackopm's avatar
wackopm
Explorer
May 31, 2017

Coleman Mach 3 AC Upgrade

I have a 2010 Keystone Laredo 265RL. My AC is starting to show its age. I've replaced a few parts on it since I've had it but am now ready for an upgrade. It currently has a Coleman Mach 3 unit that is ducted. I was thinking of upgrading to a Mach 15. My question is do I need to buy a new panel for the inside of the camper or do I need to buy any special ducting assembly since there is already one in place? Any help will be greatly appreciated.
  • garyp4951's avatar
    garyp4951
    Explorer III
    Jun 01, 2017
    You might need bigger breaker and wiring going up in amps draw, but I would check with a rv service technician. The mach 15 uses a 14" x 14" air box with knock outs for ducts.
  • TenOC's avatar
    TenOC
    Nomad
    May 31, 2017
    I replaced my Mach 3 with an Atwood air commander with heat pump. I needed to replace the external and the internal parts of the A/C plus the thermostat since the Mach 3 thermostat was wireless. With some effort I was able to snake the thermostat wire through the ceiling to the wall.

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