Question about Coleman Mach III Air Conditioner

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Thermostat no 12 vdc to a thermostat Coleman Mach III Air Conditioner. where does the 12 vdc come from? a battery in the camper or a step down transformer in the heater?

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If this is a park model trailer like mine, there is a transformer in what they call the ceiling package. It is mounted up inside the return air plenum.

Posted on Aug 21, 2013

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Posted on Jan 02, 2017

motor1258
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SOURCE: Coleman Mach III 13,500 btu ducted roof air conditioner

Did you plug upper unit (on roof) into lower control unit (inside). Not to insult you, because i've done it myself, in a rush situation. Breaker on? Sure you didn't mix up any wiring?

Posted on Aug 16, 2008

  • 1 Answer

SOURCE: coleman tsr mach 3 RV Air Conditioner

the fan motor bearings need lub....the shaft has a tiny access hole to put some oil into. because the fan shaft is slowing down, it is putting more strain on the voltage current, and eventually the internal breaker shuts down the ac........plus your condenser is not getting enough air accross it, compressor heats up, and it too will shut the unit down......older units have to be oiled every year, and eventually it too will fail, and a new blower motor assembly is needed or replace the ac unit.....blower motor units are around $130....now you install it or pay to have it done at around another $150 labor,,,,,try yourself, if it fails then call the tech........let me know ..ray..yyzazz@ao.com

Posted on Dec 31, 2008

  • 587 Answers

SOURCE: my coleman mach 3 air conditioner will not come on

COLEMAN R.V. AIR CONDITIONER SERVICE AND REPAIR QUESTIONS
COLEMAN R.V. PRODUCTS
GO TO
www.rvcomfort.com

Click on RVP (RV PRODUCTS)
Click on type of AC, if you can’t find the information you want there,
then click on contact us on the Green Bar.
You can get Service Support or Email address and Phone numbers.

Posted on May 10, 2009

  • 127 Answers

SOURCE: COLEMAN MACH 3 MOUNTING ON INSIDE OF CAMPER NOT ALIGNING WITH MY

Did you purchase a new Ducted Ceiling Unit with the Upper Unit air conditioner? If you are replacing an older mach 3, the ducted ceiling packs are not compatible and you will need to purchase the ceiling pack as well. The ducted ceiling pack part number for the 8333 series Mach III AC is below.

1. Heat/Cool Air Distribution Box - 8330B735
2. Cool only ADB - 8330A733
3. Wall Thermostat (if needed) - 7330G3351

Hope this helps.

Posted on Jul 02, 2009

  • 127 Answers

SOURCE: We have a 2000 Coleman Cheyenne pop up with a

The distance of the cord is a big deal, 10AWG Cord would be best for this situation. If you have a 50ft cord, make sure that the cord is not wound up on top itself as this can cause a drop in voltage and a spike in amperage. Is the compressor trying to come on at all? If not, then you may have a problem with the selector switch or the thermostat. If the compressor is humming for a few seconds and then stopping and then trying to come on again, it could be a problem with voltage loss. Anything below 98.5 plus or minus 10% is too low the for the compressor to kick on.


Posted on Jul 04, 2009

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If you Google airxcel.com, you should get some options. to get either their literature or tech support and they should be able to help you.

Nov 07, 2015 | Coleman Mach III Air Conditioner

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Had my camper in storage for almost ten months. Unwrapped it and the ac does not come on. The fan runs but no compressor. There is no acvoltage to compressor and the yellow thermostat wire has 12 volts. Is...


If you have 12 volts back to control box at "y" terminal when thermostat on cool calling for compressor, then relay in box not functioning properly or bad printed circuit board in control box.

Aug 30, 2011 | Coleman Mach III Air Conditioner

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I installed a new colman mack thermostat in my camper witch has a colman ac unit now ac unit runs 5 min then shuts off for 3 min then starts again and keeps doing this . so I by past thermostat and it will...


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Sep 07, 2010 | Coleman Mach III Air Conditioner

1 Answer

Colman unit is getting no power


COLEMAN R.V. AIR CONDITIONER SERVICE AND REPAIR QUESTIONS
COLEMAN R.V. PRODUCTS
GO TO rvcomfort.com
Click on RVP (RV PRODUCTS)
Click on type of AC, if you can’t find the information you want there,
then click on contact us on the Green Bar.
You can get Service Support or Email address and Phone numbers.

Sep 10, 2009 | Coleman Mach III Air Conditioner

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Sounds like the evap coil is dirty or its low on freon.

Aug 31, 2009 | Dometic Rooftop RV Air Conditioner

1 Answer

Coleman mach 3 rv roof mount ac


You will need 12 vdc (battery or converter) for controls to work, and 115 VAC (hydro) for fan & compressor to work. With your fan obviously working, that tells me you have both already but compressor may not be kicking in. Do you hear a "moaning" sound or see lights dim when switched to cool?

Aug 17, 2009 | Coleman Mach III Air Conditioner

1 Answer

COLEMAN MACH 3 MOUNTING ON INSIDE OF CAMPER NOT ALIGNING WITH MY


Did you purchase a new Ducted Ceiling Unit with the Upper Unit air conditioner? If you are replacing an older mach 3, the ducted ceiling packs are not compatible and you will need to purchase the ceiling pack as well. The ducted ceiling pack part number for the 8333 series Mach III AC is below.

1. Heat/Cool Air Distribution Box - 8330B735
2. Cool only ADB - 8330A733
3. Wall Thermostat (if needed) - 7330G3351

Hope this helps.

Jul 01, 2009 | Coleman Heating & Cooling

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