The Coleman Mach air conditioner is known for its reliability and high quality. If you’ve got the best experience with your air conditioner, it’s because of the care that goes into designing, manufacturing, and marketing these units.

But how do you know if your unit is working properly or not? If you own an air conditioner, chances are you have experienced problems with it at some point. This article lists the most common issues with air conditioners and suggests coleman Mach air conditioner troubleshooting tips which you can fix yourself without having to call a technician or buy a new one. 

Why isn’t my Coleman RV air conditioner turning on?

Malfunctioning remote controls or fumbling with a cold, damp air conditioner can cause problems with your Coleman Mach air conditioner. Follow these tips to identify and correct common problems with your unit. If you turn the selection switch to “cool” and the thermostat to a low temperature (below room temperature) and nothing happens, the machine may have a significant problem. There are various potential causes for a unit not to run:

  • The power supply could be out of service.
  • Check the service panel for an open circuit breaker or fuse.
  • Examine the power entrance at the unit for 115 volts domestic USA models or 240V export/overseas models between the hot line (black) and neutral (white)

Coleman Mach Air Conditioner Troubleshooting

1. Humidity is High but Condensation Is Leaking

If the air conditioner is misting a lot and having a hard time keeping the temperature in the room below 40 degrees, it’s likely that the humidity is too high. This can occur even with the window unit as there’s no way to reduce the humidity inside the room. If the humidity is too high, the water in the air condenses, forming tiny drops that fall on the window surface. This moisture gets inside the air conditioner, causing it to overwork and damage the fans, fins, and motor.

2. Air Conditioner Doesn’t give Freshness as It Should

There are a few things you can do to reduce the stale air inside your home. Open the windows. This will help to remove moisture from the air and reduce the risk of condensation forming. If you’re experiencing a dry, dusty home, you can also try moving your furniture away from the door. This will help to keep the air flow through the room free of congesting matter.

3. Lint or dirt may have accumulated on the evaporator coil face

Dirt or lint on the coil will block the flow of air through the coil, requiring the unit to be removed, and completely cleaned with a strong detergent and water.                                                                       Protect the fan motor and electrical controls during cleaning by covering them with polythene sheet. Allow the system to dry thoroughly for many hours after cleaning it to avoid electrical shorts. Before restarting the system, make sure the filter is properly placed to prevent the unclean coil from reappearing.

4. Defrosting Doesn’t Work Properly

Thought to be one of the most reliable refrigeration systems on the market, the Coleman Mach air conditioner does have its fair share of issues. If you own an air conditioner, you’ve likely experienced problems with it at some point. This article lists the most common issues with air conditioners and suggests ways to fix them yourself without having to call a technician or buy a new one.

5. The Remote Does Not Release the Unit

If you’re having troubles with the remote control, try holding it against the wall. If it doesn’t budge, the button may have become stuck in a non-responsive state. The remote may also be faulty. Some remotes come with buttons that require a little bit of force to release. If you’ve got arthritis or a bad knee, you may not be able to release the button easily.


The following is a Coleman Mach air conditioner troubleshooting guide to help you fix a non-working or faulty Coleman Mach air conditioner. Before contacting a Coleman dealer or a local HVAC specialist, it’s best to try troubleshooting the AC by yourself. As you’ll see, the majority of the issues are DIY-resolvable, which is what this guide recommends.


On a camper air conditioner, where is the reset button?

The location of the reset button varies as per model, although it is usually easy to find. Most reset buttons are red, labelled “Reset,” and positioned on the back of the machine near the bottom. The reset button is located on the interior of some models. The button is normally located behind the service panel in this situation.

What causes an AC compressor to fail?

The most common cause of compressor failure is a loss of refrigerant. The amount of refrigerant used in an air conditioner is specifically calibrated to function with the compressor. If the air conditioner leaks refrigerant, the imbalance will eventually cause the compressor to overheat.

Should I turn off my air conditioner if it isn’t cooling?

So, if your air conditioner isn’t cooling and you suspect a refrigerant leak, or if you’ve examined the air filter and thermostat and found nothing, you should turn it off and call us right immediately.

Will a compressor start if there is no capacitor?

Compressors were never intended to function without a motor-run capacitor. The issue arises because the hard-start Kit briefly replaces the failed motor-run capacitor, allowing the compressor to restart.

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