Question about Coleman Mach III Air Conditioner

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I have a 13,500 btu coleman on our 1989 avion camper. It was making a very loud noise for some time, and vibrating then the motor locked up on it. My husband thinks the blower went out on it. It was cooling fine just loud before it locked up. What do you think ??

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  • Mike Butler
    Mike Butler May 11, 2010

    It's worth pulling the upper cover off (with hydro shut off to it) and inspecting fan & blower for obvious signs of problems.

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You should be able to turn the fan motor freely by hand. If there is any resistance or the noise turning it by hand, then the fan motor is definitely bad. Is it a wall thermostat unit or manual controls? Wall thermostat, you can use a jumper wire from the 12+ terminal of the thermostat to the HG terminal and the fan should come on, if not, then the motor is bad.

Posted on Jul 02, 2009

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