AC Unit comes on for short time and clicks off and then back on and then off again.

by Mary
(Iowa)

Question: AC Unit comes on for short time and clicks off and then back on and then off again. It continues to do this until I shut it off. We are camped at a commercial campground and it is very hot. The AC unit has been running a lot. I thought maybe it was freezing up and ice was forming on condenser coils as it is also very humid. However, when I left it off for 3 or 4 hours and turned it back on it ran OK for a short period of time and then started the on again off again thing.



Robbie: I STRONGLY suggest you have a tech look at your unit. I think you might have a burned, loose connection in your 110V supply that is arking and getting hot. It will run the fan, but when the compressor comes on it will shut everything off and mimic the symptoms you have explained. I suggest you have it checked ASAP to prevent the possibility of damage or fire. Please let me know what you find so I can post the results for our other readers.

Good luck,
Robbie

Comments for AC Unit comes on for short time and clicks off and then back on and then off again.

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Jul 25, 2011
AC Unit - on and off again
by: Mary

Robbie, When AC unit has been off for a while and you turn it on, it runs ok for a while until trailer is cooled then when it needs to come back on is when the problem starts of on again, off again. Sometimes is sounds like the compressor tries to come on and cannot and then clicks off. Sometimes the compressor does come on, runs for a minute or two and kicks off then in a minute or so comes back on and then off again. Thank you for answering. We have not moved the trailer since I wrote the first blog. We are not even sure where to take the trailer as we do not know of service places around this area. Thanks again for your advice.

Jul 27, 2011
AC Compressor has a short?
by: Robbie

There is always a possibilty the pressure switch on the compressor is going bad, or a start capasitor is getting hot. Either way I would advise a tech look at the AC. Parts in the upper area of the AC carry voltage even after you unplug your unit and if touched can knock you on your butt and seriously hurt you.

Jul 13, 2012
update....
by: Heather

I was just informed that the ynit cycles back and forth from a/c to heat pump. Sorry for the confusion.

Aug 18, 2015
same issue NEW
by: john

I am having the exact same issue with my a/c. I am not able to bring the camper to a tech. Someone please tell me what needs repair. I have been a mechanic my whole life. I just dont know camper a/c units.

Sep 27, 2015
AC kicks on kicks off NEW
by: Ronny

John,
Have you had any luck finding out what is wrong with your AC? I have one doing the same thing, I have a new thermostat ordered hoping that fixes mine. We use the RV for lake trips, I noticed a few months ago my AC would run until it was well colder than the thermostat was set for and it was not long until it started cutting on and off, I would have to set the temp selector either cooler or warmer to make it stop. I was hoping you had found the problem and would pass the info on.

Jun 29, 2016
Tried a lot w AC unit, still flakey NEW
by: Anonymous

I have had this problem on a 2013 Puma w Brisk Air 2. I replaced the thermostat, logic card, and I retaped duct areas. The cycle on and off problems continue. This occurs when outside temp is close to inside temp (example inside is 75 and outside is 77 range. There is a flaw in these units and Dometic is not supporting customers.
Dometic gave me BS about position of Thermostat and such nonsense. A dealer had the camper for a day and never could duplicate the problem. The dealers don't have a quick fix. Dometic needs to step up. Also, with the way this thing cycles on and off it won't last long and I'll be stuck buying a new one.
Disappointed in PA

Jul 14, 2016
sun making it difficult for a/c NEW
by: Anonymous

My camper a/c would come on shut off come on shut off.it would blow cold while it was on but wouldn't stay on long enough to do any good.I put a ¼in ply wood on the a/c to block the sun and it helped a whole lot

Jul 25, 2016
2004 DUCTED 15000 DOMETIC A/C NOT COMING ON UNLESS I LOW TSTAT TO 50-60 NEW
by: JOHN

YESTERDAY MY A/C TURNED OFF, I HAD IT SET AT 75. I MOVED THE TSTAT DOWN TO 72,THEN 68,THEN 60 AND THE AIR THEN TURNED BACK ON. IT STAYS RUNNING AT THAT TEMP. NUT WILL TURN OFF IF I MOVE IT TO 75. IT'S A 108 OUT SIDE. I THINK IT'S THE TSTAT?

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Robbie Warford, San Diego RV Repair

Hi, I'm Robbie. Welcome to Money-Saving-RV-Repair.com!

Like the name implies, this site is all about helping you save money while keeping your RV in tip-top shape--and that is all about you having the knowledge to do so.

I've been a technician in the RV industry for 30 years, operating out of San Diego, California. And let me tell you, I love my job.

But I also love empowering RVers with the knowledge they need to make the right decision on repairs, or to make the fix themselves--and that, my friend, is the reason for this website. I hope you enjoy.

Or, learn more about me, my RV service practice, & this website here.