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Old 05-25-2014, 07:18 AM   #1
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A/C not cold

We are out camping and I noticed that our a/c isn't blowing cold air like it normally does. Last season we would leave it on at night, but have to close the blind in front of the bed so it didn't get too cold. And that was on the low setting. Last night I left it on low and woke up around 2am because of how warm the camper was so I put it up to high. Woke up around 6 and the camper felt a little cooler, but when I opened the door it was actually cooler outside than in the camper. Normally on high I would have to wear a coat to bed if I didn't want to freeze. I can hear the compressor kicking on, the air just doesn't seem very cold, only cool. For reference it was only 70 last night, so should have make the camper an ice chest. It's a 2109s.
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Old 05-25-2014, 07:25 AM   #2
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Restricted air filter?
Low on Freon?
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Old 05-25-2014, 07:38 AM   #3
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Cleaned the filters, they weren't too bad. Seems like it's cold when the compressor first kicks on when you fist start it, but after a couple minutes the compressor cuts out and it goes back to just cool. Wondering if it's the thermostat or something not kicking the compressor back on, or on often enough.
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Old 05-25-2014, 08:04 AM   #4
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Switch unit off. Take the cover off the unit on the roof. Check and clean if necessary the condenser coils. If they are very dirty or cloged will shut down the compressor on high head pressure or (thermal overload compressor too hot).
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Old 05-25-2014, 01:33 PM   #5
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Quote:
Originally Posted by Smitty75 View Post
Wondering if it's the thermostat or something not kicking the compressor back on, or on often enough.
Stop wondering and measure. Put a thermometer in the A/C duct to measure output temp. Put another thermometer near the thermostat to measure ambient air temp. Set the thermostat just low enough to make the A/C turn on. Note the time, ambient temp and output temp. Keep taking these readings at set intervals (every 2-5 min.) until the unit cycles off. Keep measuring until the unit cycles back on. This will give you a clear picture of what the A/C is doing, how much and when.
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Old 05-25-2014, 04:19 PM   #6
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What temp is your thermostat set at?

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Old 05-25-2014, 05:06 PM   #7
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Unfortunately it is an all in 1 unit, low cool and high cool. The thermostat is built into it, just has a turn knob with red on one side and blue on the other.

When I get home from camping I'll dig Into it. I will start with pulling the cover off and cleaning everything good. I don't think it's a voltage issue, but I will verify with a meter.
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Old 05-25-2014, 05:58 PM   #8
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Could red/blue temp control be stuck in partially red/warm area?

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Old 05-25-2014, 06:28 PM   #9
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FYI You should have about a 10 degree drop in temperature from return to discharge.

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