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Old 03-16-2019, 10:19 AM   #1
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Rear AC Doesnít Get Cold

When I turn on the rear/bedroom AC (Coleman), the compressor sounds like it comes in but it isnít blowing out cold air. This is in moderate outside temp at 75 degrees. It has previously worked and I have cleaned the inside foam filter. What else needs to be checked?

Secondly, does anyone know if this particular unit has a heat pump? The thermostat display led ďheatĒ selection and the fan will come on with no heat.
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Old 03-16-2019, 10:31 AM   #2
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Well, if it doesn't give you cold air it won't give you warm air if it's a heat pump and it's low on pressure from a leak.
The heat setting on the thermostat could be for your furnace.
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Old 03-16-2019, 11:12 AM   #3
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The main/front thermostat has a gas heat and electric heat setting. Iím more concerned about the cold air AC now as weíre in Arizona and the temps are starting to get warmer.
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Old 03-16-2019, 11:14 AM   #4
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First I would turn it off for 5 minutes and retry. I know this is obvious, but the compressor may need to recycle.

Next I would check all the wiring connections, visually check the components, then check into replacing the compressor start capacitor. With all power off, of course.
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Old 03-16-2019, 08:55 PM   #5
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Are you on 50amp? Could the power management system be 'shedding' that system?
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Old 03-16-2019, 09:16 PM   #6
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SB, yes I have cycled it as I have tried it on two recent trips now.

Jeffrey, I was on 50 amp. The unit also has worked in the past with the generator. The fan comes on and I can hear the compressor. I think that I'll have to have a repair shop look at it.
Thanks for your help.
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Old 03-17-2019, 11:24 PM   #7
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Dependent on the AC/heat control, if you have 2 of them you have to ensure the main one is on AC and not heat or the bedroom one will not work on AC. This works for the same for the Heat pump. If the front one is on Electric heat then the rear on when put o Heat will work. I think this is correct.
Before you get too hog wild, when was the last time you checked your ATS? You need to do this first. Make sure all electricity is shutdown then you can safely access the ATS to check that all the lugs are tight and that there are no melted or burnt wires. If yo have a hard wired Surge protector this is also the time check the lugs on it.
I say this because it sounds almost like you are losing one leg of your power.
Also check the end o f the sore power cord for burnt or melted prongs .
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Old 03-18-2019, 09:33 AM   #8
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Supergewl, I will check the lug nuts on the ATS, as I have read that some weren't tightened down. However, ther plug ends are fine and the AC unit does turn on, plus I can run a coffee pot at the same time as the microwave with the generator. We are currently dry camping on hot weather.
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Old 03-19-2019, 07:56 PM   #9
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If you have a digital thermostat, make sure that the AC unit is getting signal to start the compressor. You could call Airxcel and they may help you troubleshoot. They have helped me in the past.
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Old 03-23-2019, 09:23 PM   #10
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Do you have a power monitor system that should show a definite amp increase if the compressor was really kicking in. As already stated, the starter capacitor is a not unusual culprit for what you describe, even if you think you heard it.
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Old 03-24-2019, 05:02 AM   #11
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This just happend to our front AC. Had a repairman out and needed a new unit. Groan $$$. Only 3 years old...........Of course, out of warranty but will call and see.
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Old 03-24-2019, 04:40 PM   #12
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After checking the front ac unit to be sure it is set correctly as supergewl suggested. Make sure the radiators on the unit are clean. Dust sand and dirt can fill them up and stop them from working
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Old 03-28-2019, 06:16 PM   #13
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It looks like I have a few more things to check before takig the unit in to be checked. I'll look at the thermostat, the filters on the roof (we have been camping a lot I the desert winds) and checking the amps when starting the unit. I've been told that they usually replace the AC rather than repair it, ugh!
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