High speed My unit doesn't work on high speed but works on low. It is a Mach III air unit. The setting works on low but it doesn't blow out when you turn it on high

SOURCE: 2000 coleman mach

It is possible that the compressor has completley failed and is shorted to ground. The way you check is to access the compressor terminals where the wires hook up. After noting the location of each wire, remove the wires from the compressor terminals. Get a piece of sandpaper and shine up a small area on on of the copper pipes coming out of the compressor. Use an ohmmeter and check for continuity between each one of the compressor terminals and the copper pipe. If you have ANY continuity from any terminal(s) to the pipe, the compressor is dead and will require replacement. If not then check all of the wiring to and from the compressor looking for any possible shorts to ground (wire chafing, cuts, etc.) After that, check the run capacitor for the compressor. If the capacitor is failed, it will cause the compressor to draw locked rotor amps. Generally speaking, the quick way to tell if it is a capacitor or a short is to listen to the unit. If it trys to start for a couple of seconds and the pops the fuse, either it is the capacitor or the compressor is seized up. If it trips the very instant that it trys to come on, it is a short.

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 [email protected]

SOURCE: I have a Mach III. Unit blows hot air and bogs down when cooling.

probably (90 %) the compressor's bad, depnding on the repair cost you probbly want to just get another AC unit

SOURCE: Mach III Air Conditioner: i have a coleman mach I rv air conditioner. Last ...

Hi, its very possible the capacitor is open or shorted. Look it over to see if it is leaking oil or swollen or even deformed. When installing a new condenser fan motor, they should sell you a new run cap with it. Its probably a 5 uf 370 volt cap and you can have it checked to see if its putting out the right amount of micro farads. If it shows any of the signs I have said, the cap is bad and you will need a new one. Does the motor spin free? If you have a meter, a digital is best, you can check to see if the motor is open or shorted to ground. Set the meter on continuity, and check each lead to ground. If it is open, your meter will show no reading. If shorted to grd, you will have a reading or a beep if your meter has that option on it. This is how you will know. If it would be best for you to take off the run cap and take it in, they can check it for you where you bought the motor. Its not unusual to loose a motor in a year as they work hard in the heat. I have seen them last for years and for just a couple of months. Keep me posted.
Best of luck to you,
Shastalaker7

SOURCE: Today the blower motor started running

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