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Coleman tsr mach 3 RV Air Conditioner

I bought a Camping trailer that has a Coleman Tsr Mach 3 Air conditioner on it. I can run the fan on it on High, or Low for hours. When I put it in the "cool" position it cuts off after about 10 min. This happens wheather it is in the high or low setting. I believe I'm having the same problem. I just bought a used travel trailer equipped with the Coleman TSR Mach 3. We started using the a/c this past Saturday morning and was working fine until about 2:00 pm when the sun was directly over the camper. Then the compressor kept shutting off and when it tried to kick back on it just couldn't. So we turned it off and when the sunset and everything cooled off we started it back up and it ran all night long because we stayed in it just to make sure. We left it running all day Sunday until 2:00 pm came again and the compressor shut off again. Again when it cooled it ran fine. Now two days later it will run for about an hour and it will cut off and when it tries to come back it just cant't make it. Nothing is tripping inside the camper or the house, water is also dripping from atop the camper so I don't guess it is freezing up. Could this be something major? Please help I hate to buy a new one.

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  • BIGHUNTER3 Jun 14, 2008

    I think we figured it out!! I took everything apart and cleaned thoroughly while it was still messing up. I kinda tapped the starting capacity and then all a sudden it started working for a few minutes. I replaced the wire connectors and put a new starter capacitor and is now running very good. Thanks for the valuable information.

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I don't think you need a new one just a good cleaning and service. The unit has a liquid high temperature line near the compressor with a fan blowing outside air across it this coil gets clogged over time with air-borne dirt and pollen and leaves and such and must be cleaned regularly or the unit will be unable to remove the heat from the coil and during the peak demand (3pm) the circuits that protect the compressor and the trailer wiring from being overloaded and burning or melting will trip. From what you have described it sounds like the RV is working as it should with a condenser coil that needs to be cleaned. GL and happy camping!
P.S. I've only serviced the occasional RV unit but in those cases I laid a piece of plywood on top of the Rv for work platform removed the retaining screws from the top cover and used a spray bottle with a good heavy foaming cleaner a shop-vac and a brush to get the job done.

Posted on Jun 11, 2008

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My Coleman mach air conditioner on my pop up needs to be replaced, per a friend. He when the freon is gone, so is the unit. Is their a part that can be replaced and just add freon.

Posted on Feb 09, 2009

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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

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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

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