3 Common Coleman Mach RV Air Conditioner Problems (Troubleshooting)

coleman mach rv air conditioner troubleshooting
coleman mach rv air conditioner troubleshooting

Coleman is a brand from Chicago which mostly focuses on manufacturing outdoors products. These are designed to be installed in motorhomes and recreational vehicles.

The equipment includes tents, camping gear as well as electronic devices. The process to install them is quite easy after which you are provided with tons of features.

This makes Coleman one of the best companies to purchase camping-related products. The reviews from users have also been mostly positive. Though, there are still some errors that can be found on their appliances.

We will be using this article to list a few troubleshooting steps for the Coleman Mach RV Air Conditioner. This should help you in fixing the most common problems that you can get on the device.

Coleman Mach RV Air Conditioner Troubleshooting

  1. Check Thermostat

If the user notices that their air conditioner unit is blowing hot air or if it is at room temperature. Then the first thing that you should be doing is checking the thermostat on your device. This is usually used to control the temperature of air that your unit will be blowing out.

You can alter it and then it is set to any value that you want. The main reason why people have a problem with this is that they select a temperature that is higher than the current room temperature. To get your air conditioner to work optimally.

The user will have to set the value to something much lower than what the current room temperature is. The process is quite easy and you should not have much trouble with it. If you are still getting confused then try lowering down the temperature to its lowest value. You can then increase it slightly to find an optimal temperature.

  1. Clean Air Conditioner

If you are still getting warm air or if the pressure is too low. Then the vents on your unit might be getting blocked from dirt.

The air conditioners from Coleman have filters on them to block all the dirt. Though, these will start to get clogged up with time. After which you will notice that the vents will also get covered with dust particles.

This is exactly why the devices require their user to clean it off frequently. The process is quite easy and you should not have much trouble with it.

Start by opening up the unit from its front. There is a small plastic lid that should easily come off without much force. Make sure that you do not apply much pressure because the lid can break easily.

You will now notice the dust in your vents and filter. The white filter can be taken off completely and then cleaned. As for the vents, you can clean them off with a wet cloth. While these can also be removed, there is no need to do so. After completely cleaning off the filters, place them back in. You should now be able to use your air conditioner with cold air coming out of it.

  1. Check Circuit Breaker and Wiring

Sometimes the air conditioner unit can stop functioning completely. This usually indicates that your device is not receiving current from the outlet. Before trying to check your connections, make sure that you take proper precautions. Electrical wiring can be dangerous to mess with if you are not familiar with the process.

This is why it is mostly recommended that the user contacts an electrician to check the problem for them. They will both identify what is wrong and even fix the issue for you.

However, if you want to start on your own then check the main circuit breaker. This usually switches off once the value of current starts going lower than normal. The connection will then be cut off and your appliance is saved from getting damaged.

The fuse in them will then burnt out and require you to replace it. You can take out your current fuse and check the current value on it. Afterward, proceed to purchase a similar fuse and install it in your circuit breaker.

Finally switch on the connection back up to proceed to fuse your air conditioner. The wirings can be check through a voltmeter to ensure the value of power coming from the outlet. Try changing your outlets to confirm if there are any issues with it.

3 thoughts on “3 Common Coleman Mach RV Air Conditioner Problems (Troubleshooting)”

  1. In June 2021 my 2014 Winnebago Trend A/C went out so I purchased a new Coleman Mach Mach 3 +AC unit. It is model number 48203-666 which is supposed to be a 13,500 btu unit which is the same btu capacity of the unit it replaced.

    And just for reference the Winnebago Trend is a small c class RV, about 23′ long. Even though it is advertised as sleeping 6, it is just me and my 3 small Jack Russell terriers.

    The first dog trial I went to with the new A/C was in July in North Carolina. The temperature inside the RV got to over 95 degrees. I had a mobile guy install the unit and he said to take it to a Coleman Mach authorized service center for a warranty claim. I took it to Great Escape RV Rental, they were nice folks, look at my RV and told me the unit was functioning as specified, so no warranty replacement required. I had them replace the inside unit just in case it was a control problem. They also told me to put insulation over all of the windows.

    The next two dog trials were in October in Gainesville Georgia and Williston Florida. It got up to 95 degrees inside my RV with it running continously on high cool from 7 am to 10 pm. The only way I could survive it with the dogs was to run the truck air conditioner for two hours from 4 pm to 6 pm. I had added two layers of rigid insulation to all of the windows. I am telling you, the capacity of the new air conditioner from Coleman Mach is not 13,500 btus as specified and the unit I have is some kind of lemon. I have gone back to Great Escape and to Coleman Mach to try to get some kind of satisfactory resolution to my problem. So far nothing.

    It is sad, because I have purchased Coleman products in the past and was very satisfied.

    When I am out in my RV, and something as important as the A/C is not working, it is a complete nightmare. I do not know if the lemon AC Coleman Mach unit is the result of a Covid disruption, and as inconvenient as it has been, if they would just replace my unit with one that actually works, I would be happy. But so far, nothing.

    As things stand, I would not recommend this unit.


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