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Old 07-09-2011, 08:46 PM   #1
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dometic roof a.c.

Checked breakers and fuses but a.c. is not pumping cool air. Just purchased Tracer travel trailer last Sept. 2011 unit. It was running fine but checked yesterday and on auto and HI fan no cold air-any suggestions?
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Old 07-10-2011, 06:15 AM   #2
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Do you have it on cool or fan? Your post makes it sound as if you have it on fan.
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Old 07-10-2011, 06:58 AM   #3
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i don't know how long u let it run, but my compressor seems to have a delay in it. on the last trip, i also had the compressor shut down for a few minutes then come back on...fan continued to run. it wasn't a short cycle.
my first thought would be m109rider's suggestion.
other than that, the easiest thing would be to see if the thermostat is not set or bad.
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Old 07-10-2011, 10:04 AM   #4
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I have it on cool but compressor does not come on
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Old 07-10-2011, 01:00 PM   #5
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Low freon? You'll still under warranty right?
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Old 07-10-2011, 06:26 PM   #6
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Yes, I'm still under warranty . I can't get in to RV dealer until 27th of July. They're swamped
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Old 07-10-2011, 08:55 PM   #7
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That sucks.
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Old 07-11-2011, 05:27 AM   #8
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FYI, I am not being a smart *****, but thought i would let you know that the word "Freon" is a trade name for R-22 Refigerante made by DuPont.

In todays A/C systems R-134a and R-410a is being used but R-134a is being phased out just like R-22, but for different reasons.

DuPonts Name for R-134a is "Suva" 134a. Different manufactures have different names for the same refigerante.

85% of A/C failures are caused from an electrical problem, high voltage and or low voltage (controls) the other 15% is the refigerante circuit, something as simple as a dirty filter (lack of air flow) to a sensing bulb on the coil and the worst thing is a refigerante leak.
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Old 07-11-2011, 10:19 AM   #9
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if there is any pressure at all in the system, the compressor should start. (if the feon is very low, it may cycle right hack off).
i agree with the previous poster, more than likely electrical. fan works but compressor doesn't come on...first thought is still thermostat; then i would start looking at the unit. (i'm lazy, l like to exhaust the things easy to reach first).
i'd make sure that thermostat is calling for the compressor to come on.
no older than ur trailer is, i would also look to see if thermostat wires are tight at the thermostat and at the unit.
i would probably go into the controls in the unit and try and force the compressor to come on.
an after thought...with the power off, i would make sure the 110 connections were also tight.
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Old 07-11-2011, 10:39 AM   #10
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if your brave take down the cover inside and check the wires. mine would randomly shut off and all it was was the wires in the marettes just inside the unit were not done well and needed re-done.

of course, SHUT OFF POWER prior!
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Old 07-11-2011, 10:45 AM   #11
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Silly question- but what was the temperature outside when you checked?

I bought my trailer late fall so the first chance I had to try the A/C was in the spring. The temperature outside was around 15C/60F; and I wasn't getting any cold air. The next time I tried it the temperature was closer to 25C/75F and it worked just fine.
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Old 07-11-2011, 05:28 PM   #12
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I had the same problem with my new TT. Worked fine at the walk through when i picked it up and didn't work after I brought it home. Turned out to be the yellow cooling call wire was loose on the thermostat terminal. May not be your problem but it might save you the trip to the stealership. Be sure to disable all power at the breaker first.
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