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Old 09-06-2004, 03:49 AM   #1
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I have a 40' Travel Supreme with 2 A/C, they run off of one thermostat, unit 1 runs the A/C in the kitchen and living room. unit 2 runs the bath and bedroom, even thou they both feed into the same duct work.
Unit 2 seems to cool the whole trailer with no problem, but unit 1 sounds if it runs just fine, it just dosen't cool, when I was cleaing unit 1 filters I was looking up in there and I found this wire rolled up and tied (about 20') with a sensor looking thing on the end, what is this wire for?
Any ideas why unit 1 isn't cooling, it seems like it work 6 months ago, but seen no reason to run it..
Any ideas
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Old 09-06-2004, 03:49 AM   #2
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I have a 40' Travel Supreme with 2 A/C, they run off of one thermostat, unit 1 runs the A/C in the kitchen and living room. unit 2 runs the bath and bedroom, even thou they both feed into the same duct work.
Unit 2 seems to cool the whole trailer with no problem, but unit 1 sounds if it runs just fine, it just dosen't cool, when I was cleaing unit 1 filters I was looking up in there and I found this wire rolled up and tied (about 20') with a sensor looking thing on the end, what is this wire for?
Any ideas why unit 1 isn't cooling, it seems like it work 6 months ago, but seen no reason to run it..
Any ideas
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Old 09-07-2004, 07:43 PM   #3
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What you may have found rolled up is the temperature sensor (Thermistor) It should have been placed in an area (prefferably an inside wall to sense the temperature of that area. I would try unrolling it and temperarily placing it in the middle of area out of direct air flow out of the ducts. If this solves the problem then you will need to find a way to run the wiring to get it to a permanant mounting.
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Old 09-12-2004, 03:47 PM   #4
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I had to wait for a warm day, I put temp sensor somewhere as you suggested. Did not help, any other ideas?
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Old 09-12-2004, 04:10 PM   #5
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Do you know for sure that the compressor on unit 1 is running? IF not it will not cool. Measure the temperature going into the unit and the temp. coming out. What readings do you have?
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Old 09-13-2004, 09:35 AM   #6
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Dasaro, a few basic questions:
Year of camper? Type of A/Cs (Coleman Mach)?, Are you plugged into 30A or 50A? Do you have owner literature describing system, and does it say that both will work on 30A? Are you certain there is only one thermostat that controls both A/Cs?
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Old 09-13-2004, 04:43 PM   #7
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1996 Travel Supreme, Coleman A/C, plug into 50amp, yes I have Lit and Yes one thermostat runs both A/Cs.
I have used both before, but only a few times, maybe a year ago was the last time, but this unit has only been used a few times since new. I have glanced at Lit before but I don't know what they are talking about.

R/V Wizzard, would I measure the temp going in at the the point of the air filter?
the compressor dosen't come on like number 2 does, it's more like a fan just running.
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Old 09-13-2004, 08:18 PM   #8
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Yes, measure the return temp at the filter. If the compressor is not comming on this is why it is not cooling. You have a control problem and will need to troubleshoot the circuitry to find what is braking down. Does your unit by chance have a Energy managment control pannel? If so give me some info on it and I will look up the schecmatics and look to see if this could be a source. Do you have schematics on the a/c's?
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Old 12-31-2004, 03:31 PM   #9
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When your problem is solved, you should run both a/c's regularly, just bump up the theremostat so it does not get too chilly.. They, like a lot of things, need to be run to lubricate seals, etc.
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