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 Post subject: Carrier AC
PostPosted: Mon Aug 21, 2017 5:04 pm 
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Joined: Mon Jun 04, 2012 9:30 pm
Posts: 305
Location: Tennille Ga
OR Year: 2010
OR Model: 337RLS
Member ID: ORF-1538
My AC is still not working, a repairman over the phone told ,e to get a new capacitor, and thanks to this site I was able to find one. Put it on, still no cool air. The system will run for about five minutes then cut off for 4 minutes then restarts. During the run cycle the bottom of the compressor is warm and all of the lines are warm. The cooling towers are not stopped up with dirt, they are clean. Still Carrier no longer makes a RV AC, to replace and get the furnace and air to work from the same remote it will cost $1600. Does anyone have any ideas. The unit was working fine, then all of a sudden it was blowing hot air. Thanks for any and all ideas. Greg


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 Post subject: Re: Carrier AC
PostPosted: Mon Aug 21, 2017 7:25 pm 
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Joined: Tue Aug 27, 2013 7:19 pm
Posts: 308
OR Year: 2017
OR Model: MF347RES
Member ID: ORF-3551
Well have you checked your freeze control switch? That circuit controls the compressor kicking on and off. A quick test that you can do is take a reading of the switch at room temperature. Usually it will read as an open at room temperature and then put it in your freezer for about 30 minutes. You should see a short when you take the reading.

At least this is how the dometic reads. Anyway you should read one state (open or short) at room temperature and you should read the opposite state (open or short) after you freeze it for a while.

If they switch does not change it's state after going through a static temperature/freeze temperature cycle you have a bad switch. Depending on your model they may run $30 to $40 bucks.

The A/C's on these RV's don't hold much freon. Usually there is 14 to 16 oz's of freon in them. Did you notice any oily residue on or around the coils, condensor, compressor, or evaporator when you put the capacitor in? That may be a sign that you have leaked your coolant out.

Another thing you may try is to unplug the thermostat from the brain box then plug it back in. I have seen this work with the newer Dometic thermostats that have the capactive touch but don't know how it would work on the carrier.

Hope this helps,
Jim

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Pilot: Jim Co-Pilot: The Norwegian
Pulling a MF347RES with the Pups.


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 Post subject: Re: Carrier AC
PostPosted: Mon Aug 21, 2017 7:32 pm 
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Joined: Tue Dec 25, 2012 9:09 pm
Posts: 616
Location: Hallettsville Texas
OR Year: 2014
OR Model: RT291RLS
Member ID: ORF-2226
Sounds like the compressor is running...most likely low freon.
Have a line tap installed and gas her up! :-P
BillyBull

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 Post subject: Re: Carrier AC
PostPosted: Mon Aug 21, 2017 7:34 pm 
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Joined: Mon Jun 04, 2012 9:30 pm
Posts: 305
Location: Tennille Ga
OR Year: 2010
OR Model: 337RLS
Member ID: ORF-1538
I will check the freeze control switch, where is it? My thermostat is a remote, whould it still have the brain box? I will check to see if there is any oily residue. There is no place to add Freon, I guess one can be attached. Thank you for your suggestions


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 Post subject: Re: Carrier AC
PostPosted: Mon Aug 21, 2017 7:36 pm 
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Joined: Mon Jun 04, 2012 9:30 pm
Posts: 305
Location: Tennille Ga
OR Year: 2010
OR Model: 337RLS
Member ID: ORF-1538
I am planning on adding Freon, would low Freon cause the unit to stop running all together?


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 Post subject: Re: Carrier AC
PostPosted: Mon Aug 21, 2017 7:41 pm 
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Joined: Tue Aug 27, 2013 7:19 pm
Posts: 308
OR Year: 2017
OR Model: MF347RES
Member ID: ORF-3551
If you open your return side of the A/C and you look up into the coils you will see the freeze control switch up in your coils. It plugs into the brain box that is on your return side. On that brain box is your thermostat wire that goes from the wall into the brain box. It's usually a 2 or 3 wire brown cable.

As for putting a tap line on the unit be careful. Driving down the road doesn't do those tap fittings much good.

Hope this helps,
Jim

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Air Bags/Aisan Tranny/6.7L Cummins
Pilot: Jim Co-Pilot: The Norwegian
Pulling a MF347RES with the Pups.


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 Post subject: Re: Carrier AC
PostPosted: Mon Aug 21, 2017 7:43 pm 
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Joined: Mon Jun 04, 2012 9:30 pm
Posts: 305
Location: Tennille Ga
OR Year: 2010
OR Model: 337RLS
Member ID: ORF-1538
Thanks


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 Post subject: Re: Carrier AC
PostPosted: Tue Aug 22, 2017 6:42 am 
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Joined: Sun Jun 12, 2011 3:26 pm
Posts: 1266
Location: Cooksville, MD
OR Year: 2010
OR Model: 399BHS
Member ID: ORF-0001
I rewired my gas Furnace to operate from a separate wall mounted Thermostat instead of the Carrier. If you need to replace the AC unit, you don't have to get one that controls the furnace.

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 Post subject: Re: Carrier AC
PostPosted: Fri Aug 25, 2017 6:28 pm 
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Joined: Mon Jun 04, 2012 9:30 pm
Posts: 305
Location: Tennille Ga
OR Year: 2010
OR Model: 337RLS
Member ID: ORF-1538
I thought I give everyone an update on my AC problems. Finally found a repairman that does what he says. Anyway explain to Cody the AC guy what was happening, brought the RV to his shop, he located a hole, which he fixed, he had to put a port in the system to replace the Freon. $250 and now I have a working AC. Life is good. CW and other camping stores would not entertain the idea of fixing, they wanted to replace. They are doing their customers a hugh disservice. Again thanks for everyone who responded. Greg


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 Post subject: Re: Carrier AC
PostPosted: Sat Aug 26, 2017 11:44 am 
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Joined: Mon Aug 26, 2013 4:09 pm
Posts: 847
Location: South Eastern PA
OR Year: 2013
OR Model: LT308BHS
Member ID: ORF-3545
Nothing against CW and others.. the current AC manufacturers usually tell the dealerships to replace any ACs that require warranty issues. Built to be throw away units. One reason there is not recharge system built into them anymore. I had a friend cut and solder in a recharge port on our system after the warranty expired on our Light. And most RV dealerships anymore do not have the certified people to work on things anymore, since the industry as a whole seems to just build throw away items.

Just my two cents...

ETJ


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 Post subject: Re: Carrier AC
PostPosted: Sat Aug 26, 2017 11:49 am 
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Joined: Mon Jun 04, 2012 9:30 pm
Posts: 305
Location: Tennille Ga
OR Year: 2010
OR Model: 337RLS
Member ID: ORF-1538
I understand that, however, that is why I said it was a disservice, one could be trained at CW or elsewhere to make simple repairs. In my case I saved $1350, because it was a Carrier.


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