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Old 06-30-2010, 07:36 AM   #1
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Coleman AC Problem

My 83 excella has a Coleman ac in it. The air conditioner gets plenty cold. However it gets to cold. If you set it on a temperature sometime not all the time it will not cycle off when it reaches the given temperature. Its like it has one setting darn cold.When you turn the ac on initially the fan motor drags before starting up. Last night we noticed that there was moisture around the vents and apparently the ac did not cycle off. The drain tube seems to be working. The ac gets cold and once the blower motor starts it blows real well. Any thoughts on this problem would be appreciated.
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Old 06-30-2010, 08:12 AM   #2
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i'd start with getting some voltage readings on the 120v feed.
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Old 06-30-2010, 10:57 AM   #3
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Thanks Ricky. I know that I have it plugged into a 110 volt 20 amp outlet when at home.. Other things are on the same outlet so it could cause it to be slow to start. However this does the same thing when I am out traveling on a 50 amp breaker.Would low voltage cause it not to cycle off when it reaches temperature?
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Old 06-30-2010, 08:46 PM   #4
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what you have at the outlet is rarely what you have in the trailer. high or low voltage can cause a lot of weird things. if you're using an extension cord you could easily have a low voltage situating. you need to check the voltage in the trailer when the ac kicks on. any adapter, bad/corroded cord ends etc. can all be issues to drop the voltage. you might also have icing in the coils. at this point i'll defer to others here with more knowledge. :-)
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Old 06-30-2010, 09:44 PM   #5
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Okie,

Rich speaks the truth. You should get someone (or yourself) to do an AC amp draw test on the unit's compressor when it is operating to be sure that it is not in an over-amp situation due to lower available voltage. This will eventually burn out your compressor. A label should be present on the upper unit that gives you the amp draw specs for your unit.

Also, the hard starting might be a sign of a failing start or run capacitor. These can be checked by a competent technician.

If you have a manual analog control model (dials connected to the lower unit of the A/C), you might have a bad thermostat in the control unit that needs replacing.

One or several of these issues might be causing your problems.
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Old 07-01-2010, 07:16 AM   #6
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Thanks fellows. I will have it checked. The icing sounds like a possible choice. Or even the run capacitor. My cousin is a electrician. He said it would need 20 amps to start and runs on something like 13 amps or less. So checking would be a must.It is plugged in now at the shore plug to a 20 amp circuit. Thanks for you post.
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Old 07-05-2010, 03:16 PM   #7
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Hello fellows.I now have a new problem the fan motor want come up to speed. I believe the icing at times was dirty air filters. Not checking often enough. Thermostat seems to be working now.Any ideals on the fan motor.Mach three Coleman air.
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Old 07-07-2010, 05:03 PM   #8
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Hi,

I just replaced the fan motor on my Coleman 6759 Mach III. (1990)
$140.00 off ebay.
A pain to work on, nuts rusted, little screws all over the place.

The AC does not cool with the sun beating down on the trailer, but at night the air temp is very cold..

I'm ready to replace that one with a heat pump.
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Old 07-08-2010, 08:28 AM   #9
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Really nice job on the trailer. Perseverance pays off for sure. Yes the air is going to be replaced. I just need to decide where to buy it and what to buy that will fit and hook up to my electric and drain tube..
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Old 07-09-2010, 11:17 AM   #10
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Lightbulb New a/c

Hello Gregg. Would you happen to know what a/c fits into my excella with same electrical and drain hook up. Maybe where to buy for best price.
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Old 07-14-2010, 05:35 PM   #11
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Lightbulb Spare parts

I have decided to go with the penguin 13,000 BTUs for my trailer. I wanted to know if any of you fellows would be interested in parts.
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Old 07-14-2010, 06:32 PM   #12
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Quote:
Originally Posted by Okiegent View Post
I have decided to go with the penguin 13,000 BTUs for my trailer. I wanted to know if any of you fellows would be interested in parts.
Hi Tom,

I think you might want to consider a 15,000 Btu unit. You do have a large Airstream and live in a warm area. I have one that size (15,000 Btu) and there are times I wish I had a second AC in mine.
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Old 07-15-2010, 07:15 AM   #13
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Hi Vaughan. Thanks for the input. I really wanted to go with the 15,000 however you cannot get the drain pan with it. I also liked the lower profile one.My dealer here said I would need to go with the brisk air unit if I went with a 15,000. It is confusing sometime. It should not be .
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Old 07-15-2010, 07:25 AM   #14
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Okie,

You don't need a drain pan with a Dometic unit. They make a 'drip kit' which is used on every other RV that has interior drain lines.

It involves adding a catch cup under each drain hole and connecting the provided tubing to the molded-in hose barbs. The tubing has a 'T' for connecting to your interior drain hose.

The Dometic part # is 3107688.016. The kit includes everything you need to do the conversion, including an extra 14 X 14 gasket seal to compensate for the height of the drain cups. The tubing runs thru a channel that you cut in the original gasket. You seal the area around the tubing and then add the second layer. It's a snap!

Let me know if you have any other questions.
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