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Old 04-07-2019, 02:53 PM   #11
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Not being totally familiar with your RV multiple AC system, Are both units running simultaneously and both controlled by one thermostat? If so, I would look at the thermostat.
Thermostat could be shutting down power to the compressors, and when you shut off the AC and restart it, you could be resetting it. Good Luck
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Old 04-08-2019, 04:50 PM   #12
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You can use a clamp-on piercing valve or a sweat-on valve to charge these rv units. As far as a low pressure switch, I have never seen one on an rv rooftop unit. Not saying they ain't out there but I have never seen one.
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Old 04-10-2019, 10:29 PM   #13
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Do they share a single thermostat?
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Old 04-10-2019, 10:48 PM   #14
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My A/C in the brand new camper did the same thing. I adjusted the thermostat limiter on the thermostat itself. I could only cool the camper to 74 degrees, Now it will cool to 68 degrees interior temperature. I only adjusted mine a small amount, may do it some more later if the summer demands it. this site will help you understand it. https://www.thefitrv.com/rv-tips/mak...nditioner-mod/
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Old 04-11-2019, 01:07 AM   #15
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Quote:
Originally Posted by franktafl View Post
what are the chances that both of your ac's are low on refrigerant?
I had 2 out of 3 low on refrigerant at the same time. I added a valve and then Freon. They work great now.
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Old 04-11-2019, 02:07 PM   #16
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Quote:
Originally Posted by hbens View Post
I had 2 out of 3 low on refrigerant at the same time. I added a valve and then Freon. They work great now.
Questions would be, How did you determine they were low charge? Why were they low charge? Did you checks for leaks and repair any leaks found? Did you just add freon and call it good?
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Old 04-11-2019, 05:23 PM   #17
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I just installed the valves and split a can between the front and rear AC units. I used the middle unit all the time and these two almost never. I use all three all the time now. I don't know if lack of use was the issue.
I call it good until it isn't anymore. We'll see if this last longer than 4.5 years.
I suspected they were low charge by reading articles and posts on forums and my experience with other AC units. I ordered the parts, Freon and gauge and when I hooked up the gauge my suspicions were confirmed. Cold air is blowing now.
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