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Old 08-19-2007, 05:55 PM   #1
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The air conditioning on our Excel fifth wheel is not working right. It keeps tripping the breaker. It also blows out hot air some of the time. Any ideas on what to do to fix the problem?

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Old 08-19-2007, 05:55 PM   #2
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The air conditioning on our Excel fifth wheel is not working right. It keeps tripping the breaker. It also blows out hot air some of the time. Any ideas on what to do to fix the problem?

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Old 08-19-2007, 06:36 PM   #3
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Not much to go on here at all.....

But you do need to check a couple of things and get back to us.

1. You need to check the voltage in the trailer with the A/C running (trying to run). It should be at least 108 volts as a minimum.

2. Is the blower fan running on high and running when the unit is on or does just the compressor start and no blower?

3. Where do you have the RV plugged in, and are you using an extension cord or what.

Not much but it is a starting point.

Oh and glad to have you here on iRV2.com. Sorry that we have to meet with a bum A/C unit.
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Old 08-20-2007, 06:53 AM   #4
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Thanks for the help.
The blower is on high when it blows hot air. It sounds like it is working just the air isn't cool.
Haven't checked the amps.
The unit is plugged in directly not into an extension cord.
No problem with the electric for any of the other things in the trailer.
A/C will run for some time then switch off or will just randomly start blowing hot air.
Thank for any help
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Old 08-20-2007, 07:06 AM   #5
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Hi jrv, quick question. Is this a new unit to you or do you have any history to go by. I had a dometic unit on my tool truck one time that didn't blow out very cold. I took the lower panel off and found that the temp sensing capillary tube was not out in the air flow area. Once I moved it out to where the air was blowing across it, I got cold air until the desired temp was reached and then the compressor would cycle off. Just the blower would run until the temp came up. Then it would kick the compressor back on. Also, if you are trying to run it off of an extension cord that is not big enough to handle the load it will ruin your compressor. Keep us posted as to what you find.
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Old 08-27-2007, 10:51 AM   #6
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Also, make sure that the condensor coil fins are clean. After you clean the coil, if you are still having problems with the breaker tripping, you will need to use an ammeter and check how much amperage the compressor is drawing. My guess is that if the breaker is tripping right away, the compressor is drawing too many amps at startup. If it takes a while for the breaker to trip, the condensor coil may be dirty enough that the compressor is working so hard, causing the head pressure to raise considerably, possibly causing the compressor to shut off on overload.....Just a few suggestions.

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