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Old 04-20-2019, 07:03 PM   #1
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Not a good idea to use this to run AC?

I have done it before with my old TT. It was hot today so I thought I would try the AC in my new 2011 ROO 23ss while working inside. AC blew cold until I turned it off. It did not want to restart. After sitting it did restart but I did not run it because I was afraid I was going to kill it. Thoughts?
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Old 04-20-2019, 07:18 PM   #2
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High head pressure. Might have been off on limit... there is also a timer to prevent short cycling.

What were the ambient conditions?
What was the duration between shutting it off and you trying to restart it?
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Old 04-20-2019, 07:23 PM   #3
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94 Degrees ran it for 30 plus minutes. Restart almost immediately.
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Old 04-20-2019, 07:23 PM   #4
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Probably still had pressure in the compressor when it tried to kick back on. They can start pretty much every time when it's been sitting as there is less pressure built up in the compressor. On the lower amperage line, it did not have enough "umph" to kick over the compressor at the initial surge. I would not do that much as you can damage the compressor.


If you are going to run one like that, I would make sure to start it with the thermostat set high enough so the fan comes on first then lower the setting so the compressor kicks on. If the fan and compressor both kick on at the same time, it draws more amps. If you can manually set your fan to on, it may restart on yours. But it's better to use a proper amperage outlet (also if you have a 20 amp available instead of 15 it would be better than the 15 in the photo above).
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Old 04-20-2019, 07:35 PM   #5
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Thanks for the quick replies. I have only ran the AC a couple of times plugged into the house. I thought I would be okay using the heavy TT cable. I will not do this again. Years ago i knocked 220v in this box down to 110. I might have to research if I can add 30 amp using the unused wiring in the box.
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Old 04-20-2019, 07:36 PM   #6
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We have a local trip planned next weekend it sounds like my AC will be fine plugged into 30 amp.
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Old 04-20-2019, 07:39 PM   #7
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Quote:
Originally Posted by JPin AZ View Post
Thanks for the quick replies. I have only ran the AC a couple of times plugged into the house. I thought I would be okay using the heavy TT cable. I will not do this again. Years ago i knocked 220v in this box down to 110. I might have to research if I can add 30 amp using the unused wiring in the box.

I don't imagine you even have 15 amps available to the RV as I can see other items plugged in beside the outlet your RV is plugged into.


Mark Polk has a good article on this:


Basic RV Electricity - RV Information (RV Maintenance)
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Old 04-20-2019, 07:41 PM   #8
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True, cordless drill charger not being used and boom box that was running.
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Old 04-20-2019, 07:43 PM   #9
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I guess the question is does a breaker limit amps before tripping?
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Old 04-20-2019, 07:49 PM   #10
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a breaker is a 'heat' sensitive device, and there's no way for it to in any way 'limit' anything until it trips from 'overheating', which is it's design.

using a 15a or 20a outlet is perfectly fine for powering a 13.5 or so air conditioner, as it draws 12-13 amps even at full bore.
if it worked for a while, then you've proved the point.

why didn't it restart?
well, you said it blew cold... so maybe it just froze up, right as you initially turned it off, which requires sometimes a long wait before it will power back up.

your adapter, the 30a to 15a block adapter, simply allows you to plug into a 15a outlet, that's all... otherwise there's no difference from plugging the air conditioner into the 15a outlet directly... it's a maximum of 15amps.
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