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Old 07-14-2012, 05:14 AM   #15
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Originally Posted by Perry White View Post
Who told you that? NO WAY
New Dometic 13500 AC will only cool down to 71 degrees - Escapees Discussion Forum

Good Sam Club Open Roads Forum: New Dometic 13500 AC only cool down to 71 degrees

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Old 07-14-2012, 12:51 PM   #16
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Originally Posted by EngineerMike View Post
.... need to get up in the middle of the night & repeat the wetting/wringing.......

They have pills for that. Just sayin'....

2003 Alpine 40FDTS (400HP)
Long Beach, CA
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Old 07-16-2012, 11:29 AM   #17
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I guess I should have more specific. The compressor runs fine, but no cooling or heat. A tech checked the amp draw and it was only 8 amps compared to the 12.5 it should have been drawing. He said that indicated a lack of freon. He said the amp draw was so low because the compressor had nothing to compress and was just spinning free. Based on that, he said the unit needed replacing. He could not supply a new unit so I don't think he was trying to blow smoke. Did he overlook anything? Is there something else that could cause this condition?
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Old 07-16-2012, 11:56 AM   #18
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I would contact a good A/C Heating specialist, explain what has happened. There is a data plate on the unit, so it shows how much Freon/oil is needed to recharge the system.

A lot of RV Techs don't spend the money on a "gauge set" because they don’t want the liability of working on a sealed system, and some states make you have a license. Calling a Heat/AC guy, he has the license, and the necessary equipment to fix this. However, if that is true, then that Freon went someplace, it may have a leak (sounds fishy to me) but not impossible since age is involved.

To fix the unit, first he will have to pull a vacuum for about 4 hours to evacuate all the air/moisture that is now in the system, and then he will refill and patch the leak. If it was me, I would call the OEM customer line, and get from them the exact replacement model. They are going to want the Model Number/if any suffix/serial number, basically just take a picture of the data plate so you have all that info at hand when you call them.

NOTE, some manufacturers have stopped making RV A/C's because the Freon requirements/specifics have changed and the tooling to upgrade the plants was more expense than profit received from making a/c's. Dometic is still doing it, but Carrier has stopped, and I think several others have curtailed their units. I don't think you will have much trouble matching the old one up with a new one.

You can change the unit out yourself if you have any mechanical skills, but will need some help getting the old one off the roof and the new one up there. You can download the installation directions from the manufacturer first so you know what's involved.

You can send me PM and I will call you and we can talk about it if you wish. I'm in Washington State.

Monty & Janet - 2007 Alpine APEX 40 MDTS
S/N - 75715 - Retired - Master Certified RV Tech
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