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Old 05-09-2016, 01:34 AM   #1
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AC PROBLEMS! I have tied a rope and trying to hangon.

Though, I am almost to the point of giving up. Here is the issue and I have spent numerous hours searching for a solution to no avail. The unit is setting outside. My nephew replaced the capacitor and starter and the unit has been thoroughly cleaned. The condenser is ice cold and the air is very cool. I have plugged it up and ran it for 4 solid hours with the unit cooling good. It never cut off because it didn't get below the setting on the thermostat. I ran it on low and it worked fine. Though, when I cut the switch off and cut it back on. The unit strained to start back up the compressor and it tripped the breaker. Also, if I let the unit stay off for a few minutes and start it back up it works good. It runs perfect until the thermostat cuts it off and then restarts it. That is when the breaker is tripping. Will installing a larger capacitor or install a Hart Start Kit would that help any? Can I just remove the thermostat and run it non stop till I turn it off or is there something else that can fix it? Here is the model name and #. Coleman Mach 8335B676. It is a 15,000 BTU unit and came off another popup. I was going to install it on my popup but don't want to do that and it tear up like it's trying to do now. This belonged to my nephew but he has money so he just went out and purchased a new unit. I am trying to get this running to use in my popup. If anyone could give me any kind of answers or assistance I would greatly appreciate it. Thanks and have a "Blessed Day". Chris
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Old 05-09-2016, 01:46 AM   #2
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Well,the CONDENSER should be very warm and the EVAPORATER very cold.When you cut it off and then right back on,there wasnot enough time for the "high side" comming off the compressor,to dissapate thru the expansion valve and then thru the evaporater coils.Net result is that you were trying to start a compresser that had a high head pressure instead of equal pressure on both the suction and discharge sides.It is what they call "lockedor locked rotor".When you wait a few minutes, the charge equalizes and the unit starts normally.Thats how its supposed to work.
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Old 05-09-2016, 01:55 AM   #3
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Originally Posted by trbomax View Post
Well,the CONDENSER should be very warm and the EVAPORATER very cold.When you cut it off and then right back on,there wasnot enough time for the "high side" comming off the compressor,to dissapate thru the expansion valve and then thru the evaporater coils.Net result is that you were trying to start a compresser that had a high head pressure instead of equal pressure on both the suction and discharge sides.It is what they call "lockedor locked rotor".When you wait a few minutes, the charge equalizes and the unit starts normally.Thats how its supposed to work.
....and you may need a hard start kit to help the compressor. Do not install a run capacitor on the compressor larger than what it is rated for. Also, don't turn it off and then right back on anymore. Your compressor will get tired of you doing that and will leave you stranded
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Old 05-09-2016, 02:17 AM   #4
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Thanks for the Info

Probably some of the best info I have got. I understand about the turning on and off with no delay could be a problem. I just can't figure out why it does it again when the thermostat kicks it back on when it shuts down after reaching the temperature you have it set on when you started it. Now that is my biggest problem. Since we are going on a family camping trip in about three weeks I don't want to have to deal with resetting the breaker 10 times a day. Oh, as far as the Hard Start Kit. Will this one work? Test Listing Luxaire York Coleman Compressor Hard Start Capacitor 024 20867 002 | eBay

If not what do you recommend? Thanks again for your assistance.
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Old 05-09-2016, 06:45 AM   #5
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One question. How long is the unit off before the thermostat call for it again. The stat should have a delay in it so it will not come back on within 5 minutes or so.
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Old 05-09-2016, 06:55 AM   #6
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From what I can tell your unit is running normally. Most thermostats will wait at least 2 minutes before a restart. You indicated that when you waited before turning it on with no thermostat all was well. What remaining problem are you trying to solve?
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Old 05-09-2016, 07:10 AM   #7
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I think if you are running it outside in the open air (on a test bench) the thermostat can not sense the temperature properly if it is part of the AC, it needs to be installed and run in an enclosed place.....
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Old 05-09-2016, 07:39 AM   #8
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A few questions
What is the breaker size?
Did your camper come equipped with an a/c?



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Old 05-09-2016, 09:13 AM   #9
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Quote:
Originally Posted by tru2au View Post
Probably some of the best info I have got. I understand about the turning on and off with no delay could be a problem. I just can't figure out why it does it again when the thermostat kicks it back on when it shuts down after reaching the temperature you have it set on when you started it. Now that is my biggest problem. Since we are going on a family camping trip in about three weeks I don't want to have to deal with resetting the breaker 10 times a day. Oh, as far as the Hard Start Kit. Will this one work? Test Listing Luxaire York Coleman Compressor Hard Start Capacitor 024 20867 002 | eBay

If not what do you recommend? Thanks again for your assistance.
Not sure about THAT hard start kit. There are threads here with peeps installing them and working great. My expertise is on larger units residential and commercial.
Another thing you might want to check is the high voltage wiring connections at the breaker, breaker panel, and the hook up at your a/c unit. They need to be snug. Don't wrench too hard on the breaker lugs.
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Old 05-09-2016, 09:24 AM   #10
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Originally Posted by TURBS View Post
A few questions
What is the breaker size?
Did your camper come equipped with an a/c?



2008 2500hd Duramax
2015 Columbus 320RS
2016 nights camped "5"
2015 nights camped "34"
X2 Also check voltage, the lower the voltage the higher the amp draw.
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