- #43 of 62
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08 Sonata AC issue
by desiguy2447
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Aug 17, 2009 (6:22 am)
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The AC in my 08 Sonata limited is turning on automatically. While driving to work today I started hearing an odd sound, which turned out to be the AC blowing out at max speed. (I had all my AC vents closed). So I turned it off. Then five minutes later again I heard the same sound, and the AC was again on.
Before I head to the dealer has anyone else had a similar issue?
Thanks
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- #44 of 62
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Re: 08 Sonata AC issue [desiguy2447]
by backy
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Aug 17, 2009 (6:49 am)
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Replying to: desiguy2447 (Aug 17, 2009 6:22 am)
Are you sure this is an "issue"? I've seen this behavior on multiple cars with automatic climate control, i.e. the unit switches to "max AC" mode at startup to cool down the interior as fast as possible. But then it should ratchet down as the preset temperature is reached. How long have you owned the Sonata? Is this the first time the car has done this in warm weather, with the auto climate control on?
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- #45 of 62
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Sonata AC
by desiguy2447
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Aug 17, 2009 (7:01 am)
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Replying to: backy (Aug 17, 2009 6:49 am)
Yeah this was the first time it has done this in the morning. The temp was around 77 to 78. I have never seen the AC turn on by itself before. When driving to work in the morning around 6:30am I always have the windows down. Also when driving home when it is around 98 outside the AC will not turn unless I switch it on....
I don't think this normal behavior. Had the car for almost two years.
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- #46 of 62
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Re: Sonata AC [desiguy2447]
by billward
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Aug 17, 2009 (7:21 am)
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Replying to: desiguy2447 (Aug 17, 2009 7:01 am)
That sounds exactly like the behavior I would expect; you last two years sound unexpected, or as if you have the Auto-Climate setting turned off.
But what do I know? I've got two GLSes, and neither has auto-climate control; my Father's Suburban and my FILs Lincoln Town Car both do, and they behave as you describe if the climate control is set to auto, but I'm in both of those vehicles so rarely (twice a year each?) that I could be wrong.
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- #47 of 62
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Re: Sonata AC [desiguy2447]
by targettuning
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Aug 17, 2009 (10:34 am)
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Replying to: desiguy2447 (Aug 17, 2009 7:01 am)
I believe this is a normal situation. With all "automatic climate control" equipped vehicles there is an option to either allow the system to control the interior temperature via an auto button. If you choose this option the interior temperature is controled meaning it either cools or heats depending on the digital temp punched into the system via the dash display and the outside ambient temp. From there the system controls the AC compressor, the heater output (if needed) and the fan speed and I think air output location, dash vent, floor or both. If you (the passenger or driver) decide to vary the fan speed manually or otherwise intrude on the automatic program it (the climate control system) automatically drops out of the auto mode allowing you to pick variables manually. Thus the system becomes a manual type until the "auto" button is once again pushed. Sounds like you have been controlling this manually for all those years and somehow you accidentially hit the auto function and now are amazed it is controlling itself. I strongly believe this is normal.
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- #48 of 62
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Re: [help] A/C problem with 2004 sonata 2.7L [joshqc]
by jeff_ohio
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Aug 22, 2009 (9:16 am)
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Replying to: joshqc (Jun 11, 2007 2:41 pm)
Not sure if this would help, but I have been told that if the system is over charged it might cause this kind of problem. I recently spent 2 months trying to find out why my 04 Sonata's AC ran great in the morning when temps. were cool, but hardly ran at all when temps. were over 80 degrees. The AC would go from cool to hot and at the same time the engine performance was so bad that it felt like I was dragging something behind the car. I would have to shut off the AC completely to be able to drive the car. I had it checked at the dealer, but they found nothing wrong with the system, but I think that they only checked it in the morning at cooler temps. They said that I may have to replace the compressor, which is what the forums were saying. I bought a $40.00 AC recharge kit from AutoZone, drained the system and recharged it with "new" coolant. My car now runs great in any temps. even when it is above 96 degrees out. I believe that the lubrication in the freon was low or bad, and recharging it seemed to fix my problem completely. I have heard that there were some problem early on when the switch was made to the newer coolants, poor quality control may have been the problem. I've been told that when the dealers drain the AC system they have to capture by law so it doesn't effect the ozone, but then they recharge the AC with the same freon that they took out because freon does not go bad. Question is if the freon was a poor quality grade (low on lubrication) when installed at the factory, why would you want to recharge it with the same freon? I would drain the system completely and recharge it with the newest freon on the market, then you will know for sure that at least you are not running an older coolant that may not meet the newest requirements. From everything that I have read recently about AC systems, lack of good lubrication is the major cause for seal leaks and compressor going bad. Hope this helps you out, it helped in my case.
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- #49 of 62
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Re: Sonata AC [targettuning]
by whisper1
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Aug 22, 2009 (8:37 pm)
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Replying to: targettuning (Aug 17, 2009 10:34 am)
Just to clarify ...
Automatic AC/heat controls the fan speed, vent and recirculation. You can override them. If you do, that control is no longer in automatic mode. Untouched controls still work in automatic mode.
For multiple drivers, there is no way to tell which control is manual/auto. The only way is to press the Auto mode and then change whatever you like.
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- #50 of 62
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2006 sonata heater problems
by mikeg64
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Oct 06, 2009 (7:28 am)
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Heater is not blowing hot air, the tempature is set for heat and the blower is working but cool air is comming out not hot or warm just cool. heater hose are hot and a/c compressor is not running. i have automaic climate control settings.
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- #51 of 62
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Re: 2006 sonata heater problems [mikeg64]
by newowner10
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Oct 06, 2009 (8:00 am)
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Replying to: mikeg64 (Oct 06, 2009 7:28 am)
You need to verify that the door in the ductwork is moving to diverts the hot air. If the door is not moving you need to verify if vacuum is present to operate the door.
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- #52 of 62
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heater problems
by mikeg64
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Oct 06, 2009 (8:11 am)
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Replying to: newowner10 (Oct 06, 2009 8:00 am)
how do I verify these things?
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