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Coleman 6759a723 which capacitor to replace

My fan runs but the compressor does not. there are two capacitors on top one is a round silver unit with two terminals and the other is oval the round is part #1499-472

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Replaced that two capacitor maybe its faulty already that is the common cause the trouble there are three capacitor of that unit check the other one.

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Posted on Jul 02, 2009


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1 Answer

Coleman ac compressor quit working

The black plastic capacitor is the compressor start capacitor, it is only in the circuit until the compressor gets up to speed. The black box is the start relay, it stays closed until the compressor gets up to speed the opens taking the start capacitor out of the circuit. The wires should go from it to the small metal round capacitor and the black box.
You can Ohm out the start relay, it should be closed between Terminals 1 and 2 and the coil is from 2 to 5. You can also check the 2 capacitors, you need a Volt Ohm Meter that has a capacitor testing scale. The microFarads should be on the capacitors you will need to cut the bleed resistor on the start capacitor before testing it.

Jul 18, 2013 | Coleman Mach III Air Conditioner

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I have a Mach3 unit with 1 capacitor 35uf 370 VAC and a fan capacitor, unit trips breaker after cooling RV when system starts up again, shouldn't there be a run, start,fan capacitor? only have 2...

You need to check the Amp draw at start up of the compressor. Also if you have a meter that can check the compressor capacitor, it needs to be checked. If the capacitor is ok and the compressor starts at a higher Amp draw than the rating on the capacitor, you will need a start capacitor.

Jun 04, 2011 | Coleman Mach III Air Conditioner

1 Answer

Everything works the inside and the outside fan runs there is gas in the compressor but hot blows

check the capacitor .turn off breaker first take off the panel on the condensor to see parts .capacitor is silver. round or oval .that is your problem most likley. that helps the fan an compressor start .or could need a hard start capacitor that will hook up to the one capacitor on the unit that will fix it ...unless their is a burnt or broken wire ..look at the wires too good luck

Jul 26, 2010 | Goodman CKL36AR36 Air Conditioner

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Where is the capacitor located on a coleman heatpump

If you're talking about the outside fan, look where the wire goes into the outside unit. The capacitor will be somewhere near the circuit board and will be round or oval and metal or plastic. If you're talking about the inside unit it will be with the electrical control in the air handler. Write down where the wires go. The terminals on the capacitor will be marked and for the outside unit you will either have 1 that runs both the fan and compressor or a seperate one for each. If you have 1 that runs both the wires must be reconnected to the right terminals. They will be marked COM, FAN, HERM(stands for compressor). Take the old one with you to get a new one. Let me know what you find.

May 04, 2010 | Coleman Heating & Cooling

1 Answer

Amana Ac compressor won't come on. Heat works fine. red light blinks once and code is normal. pth123a35

would suggest replacing the compressor capacitor first before going any further. The capacitor aids in the initial start up of the compressor and if it is bad the compressor will not start. The capacitor is located in the area behind the control switches and is usually gray in color and round. They may be oval and silver also. For this type unit I think the capacitor is a dual capacitor which means it also runs the fan. Note that the compressor side of the capacitor can be out and the fan still run. So before I would think about replacing the compressor I would replace the capacitor which is about 30 to 40 U.S.D.

Good luck hope this helped

Mar 30, 2010 | Amana PTH123B35AJ Air Conditioner

1 Answer

My coleman mah 3 roof top will not blowon fan side

Sounds like you have either a bad fan motor or a bad fan motor capacitor. When you turn the unit on with the fan not working, the compressor (the humming noise) runs and gets real hot real quick resulting in the compressor cutting off ( the nothing after) on it's inside high temp switch. This is what the compressor is designed to do so that when this happens, it does not burn the compressor out. Replace you fan capacitor, give the compressor an hour to cool, then try it. In most cases and if I'm correct, the unit will run just like you want it to. Good luck.
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Sep 09, 2009 | Coleman Mach III Air Conditioner

1 Answer


Well, it sounds as if you have a Coleman rooftop unit. If you have a start capacitor with a PTCR (Postive Temperature Coefficient Resistor) then it is different than if you have a Potential Motor Starting Relay. Why are you replacing the run and the fan capacitor?

Here is a link to the documentation that you need. If you do not have a Coleman and it is in fact a Duo-Therm, let me know the model number and I will be able to pull up the wiring schematic.



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Jun 26, 2009 | Dometic Rooftop RV Air Conditioner

1 Answer

Compressor tries to kick in but then stops.

it is a hard start compacitor, the unit is not supposed to have three compacitors.

Apr 11, 2009 | Coleman Mach 15 Air Conditioner

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