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Old 05-20-2012, 08:17 AM   #1
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a/c compressor cuts off

I'm on the road in Texas with '05 Safari. Trying to use the ac, the compressor is in a cycle of repeatedly clicking on, running a few seconds, then clicking off. Any ideas what might cause this problem? -Bruce
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Old 05-20-2012, 08:44 AM   #2
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I'm on the road in Texas with '05 Safari. Trying to use the ac, the compressor is in a cycle of repeatedly clicking on, running a few seconds, then clicking off. Any ideas what might cause this problem? -Bruce
An under rated extension cord will cause that issue, everytime.

Andy
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Old 05-20-2012, 08:45 AM   #3
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I'm on the road in Texas with '05 Safari. Trying to use the ac, the compressor is in a cycle of repeatedly clicking on, running a few seconds, then clicking off. Any ideas what might cause this problem? -Bruce
Check to see if your freeze sensor (a white wire going into a probe that should be buried in the front fins of the evaporator, otherwise known as the indoor coil) is indeed still in place. You have to remove the inside grill and look up at the evaporator with a light. It could also be bad (test for continuity at room temperature) and needs to be replaced.

You could also have a bad relay board in your upper unit or a bad thermostat. It's tough to pinpoint your problem without being there to test the components.
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Old 05-20-2012, 11:00 AM   #4
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Can you give us some more precise info. How long does it run, how long is it off between runs, do you feel and cooling effect while it is running.

Give us a voltage reading, at the electric panel, across the AC breaker, will be good enough, while just the fan is on and then while the compressor is on.

When you said just a few seconds are you sure the compressor is actually starting and you are not just hearing a locked rotor.
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Old 05-20-2012, 11:10 AM   #5
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Give us a voltage reading...
You are using a 30A campground outlet?
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Old 05-20-2012, 05:11 PM   #6
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Thanks, all, for your responses. I don't have a voltage meter, but I'm pretty sure the sound I hear is the compressor kicking on, running for 1-2 seconds then turning off, with this cycle repeating about every 30 seconds.

I don't believe the problem is caused by low power. I just arrived at a different RV park, and I'm having the same problem.

I think my best bet is finding a skilled technician. Do you think I should find an RV specialist, or a (home) A/C repairman? Thanks for you help!
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Old 05-20-2012, 05:28 PM   #7
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If it is in fact running 1 second in 30 minutes that sounds like a locked rotor or bad cap on the compressor. Sounds like the thermal overload is cutting out and taking that long to cool and reset.
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Old 05-20-2012, 06:17 PM   #8
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What I have seen is the thermostat sensor is seeing air leaking from the cold air side of the unit. Moving the sensor so it is outside the airflow can help with this. Many times the air distibution panel leaks air into the intake side and that makes the air seem a lot colder that the temperature in the trailer so it cuts off. I would investigate the power issue as well. You can get a cheap Amp probe from Harbor freight that also measures voltage. You want to know the voltage and current with the compressor on.

Perry
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Old 05-23-2012, 08:38 AM   #9
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I have an 04 Safari - did a similar thing. Does the Heat Pump work ok? My problem in the end was the fan motor. It must run to get everything else going. Just a thought.
Jeff
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Old 05-23-2012, 08:57 AM   #10
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Check caps. Where are you in TX?
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Old 05-23-2012, 09:12 AM   #11
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I'd go with an RV tech. It wouldn't have to be at an Airstream dealer either. If they don't know Airstreams, I'd ask that they work with me if they think they need to go up on top. That's another topic.
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Old 05-23-2012, 11:16 AM   #12
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Run by your local Wally World, they have digital multi-meters. They have a fairly nice one for under 30 bucks, It ain't a Fluke but i'll work. Don't know about you but I carry one all the time, it will come in handy all the time.
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