Question about Coleman Mach III Air Conditioner

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I have a colman mach about 1968 model

When i turn it on high or low the fan is slower then when i unplug the brown wire it will go on high . when i cut it off then i will have to plug the brown on then take it of to high .thanks

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Replace your fan capacitor. It is probably bad. It is the capacitor with the two brown wires attached to it.

Posted on Jul 11, 2009


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I am at a bit of a disadvantage here as I have never seen a 316 and my books and parts lists don't cover it, but here goes.
I expect that your car has only an electric fan, right? And you have already checked the fuses, right?
That fan should turn on low speed when the A/C compressor is running, or on low speed when the radiator gets to a certain temperature, or on high speed then the radiator gets really hot.
There should be a temperature sensor somewhere in one of the end-tanks on the radiator. If it has three wires, the switch is inside the sensor. The switch plug will have a ground wire and two wires that go to relays. The switch will ground one of the relay wires depending on the temperature. Grounding that wire activates a relay which turns on the fan.
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Fan will not run on high. Compressor runs fine but the fan will not run on high. Works fine on low and med.

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Aug 01, 2009 | Coleman Mach III Air Conditioner

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Need switch for colman a/c unit

jason, if you are willing to to a little wire tracing, you can do this! We're going to create a new switch function. Chances are that two of the wires are probably for the fan motor (high and low). I'm not sure about max and normal. This uses a two position switch. Figure out which wires go where...then...get a '3 way' switch from the hardware store (they contain a common and two 'poles') along with a plastic box to contain them, a double switch cover and some 'heavy duty zip cord'. This is lamp cord but a heavier grade called number 16 or number 14 (14 preferred). Extend each of the wires and tape the connections. Now, threading the wires into the power box, hook the two fan wires that come to the switch to the new switch. Now, the common terminals and the power supply wire (probably the black) should be hooked together. It should all work...ugly but functional. If you need an on/off switch, you can make that a three gang box and include a standard on/off switch. If you can figure out the max/normal function, you can either switch it on or off or either/or...depending on the switch function. Hope this helps.

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