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Have coleman roof air keeps cycling compressor on and off

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That is normal operation, unless it does it frequently, like more than once a minute. if its cooling good but turning on and off to often there is a thermostat problem, and the it needs to be replaced

Posted on Jun 17, 2009

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1 Answer

Btu of coleman 7830-901


That should be a 30,000 Btu unit. Its been a while since I worked on them. The 78 is the series or model, the 30 is the capacity or btu's and the 901 indicates it is a Copeland compressor.

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Coleman mach rv roof ac, the fan comes on but the compressor doesn't, i've replaced all capacitors and stll is not comming on, how do i check voltage to the compressor to maske sure i have pow


At the compressor connectors you have a live and a neutral phase. The live usually goes to a ptc relay starting mechanism which you can test with a meter. If you can disconnect the relay and check the windings of the compressor from one pin to the other two it will tell you if the compressor is open circuit. It is more often than not an overload fault.

Apr 23, 2012 | Coleman Heating & Cooling

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Coleman Roof air on Rv starts to cool the pops the breaker any ideas?


Hi,
Yes, the capacitor to the compressor or the compressor its self have gone bad...try changing the cap first....then if that don't work its big bucks...

heatman101

Aug 31, 2010 | Coleman Mach III Air Conditioner

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Coleman RV Roof Type 110v


COLEMAN R.V. PRODUCTS
GO TO rvcomfort.com
Click on RVP (RV PRODUCTS)
Click on type of AC, if you can’t find the information you want there,
then click on contact us on the Green Bar.
You can get Service Support or Email address and Phone numbers.

Jul 25, 2010 | Coleman Heating & Cooling

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.
Please rate solution

Sep 09, 2009 | Coleman Mach III Air Conditioner

1 Answer

Compressor trie to start, but don't.


Capacitor is good place to start, once you confirm you have proper voltage getting to the unit.

Jul 20, 2009 | Heating & Cooling

1 Answer

I have a Coleman 6770 A Series roof air on my trailer. It won't blow cool air. Is this a compressor problem? And if so, would it just be cheaper to replace the whole unit than to try and repair this one?


Before the compressor is condemned, is it running at all? Is it getting the proper voltage? If the compressor will run and still does not cool the system could be low on refrigerant.

A replacement compressor is normally more economical than replacing the entire unit. It could be something as simple as a open thermostatic control.

Jul 03, 2008 | Coleman Heating & Cooling

1 Answer

Coleman rv roof air conditioner


(1)Check compressor contactor or relay if it stock in the close position
(2)Check for welded contact points
(3)Check switch control for defect
(4) Check if compressor contactor still geting power when it is off


Let me know what works for you.

Mar 30, 2008 | Heating & Cooling

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