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OB Mechanics - AC Cooling only while moving
Posted on 6/9/16 at 10:09 am
Posted on 6/9/16 at 10:09 am
Wife has 2011 GMC Acadia.
AC cools only while in D and moving, not cooling when in D but at a light or stopped in traffic.
What damage am I looking at? What should I try before going to mechanic (Freon recharge kit)?
Thanks
AC cools only while in D and moving, not cooling when in D but at a light or stopped in traffic.
What damage am I looking at? What should I try before going to mechanic (Freon recharge kit)?
Thanks
10
Posted on 6/9/16 at 10:12 am to ThatsAFactJack
I had a vehicle (Ford 500) that did that. Ended up being a valve inside the compressor that needed to be changed. Cost $200
Posted on 6/9/16 at 10:12 am to ThatsAFactJack
Stop using the AC before you burn up your compressor.
Poor airflow to the condensor is the culprit.
Either your condensor had 50 million bugs in it... Or, the more likely problem, you need a new condensor fan.
Poor airflow to the condensor is the culprit.
Either your condensor had 50 million bugs in it... Or, the more likely problem, you need a new condensor fan.
Posted on 6/9/16 at 10:17 am to X123F45
quote:
Rando
quote:
Or, the more likely problem, you need a new condensor fan.
What kind of cost am I looking at for that?
Posted on 6/9/16 at 10:17 am to X123F45
quote:get the 4 seasons dual fan and change it out yourself
you need a new condensor fan.
This post was edited on 6/9/16 at 10:20 am
Posted on 6/9/16 at 10:19 am to meauxjeaux2
quote:
meauxjeaux2
quote:
you need a new condensor fan.
What am I looking at cost wise for that at local mechanic not a national chain like firestone?
Posted on 6/9/16 at 10:21 am to ThatsAFactJack
verify that the fan isn't coming on first. One fan is your radiator fan that comes on when the engine reaches operating temperature. The other should immediately come on when the ac compressor engages.
Posted on 6/9/16 at 10:23 am to meauxjeaux2
quote:
meauxjeaux2
quote:
verify that the fan isn't coming on first. One fan is your radiator fan that comes on when the engine reaches operating temperature. The other should immediately come on when the ac compressor engages.
Fan comes on when ac compressor engages. I assume radiator fan is coming on also since car does not overheat
Posted on 6/9/16 at 10:24 am to ThatsAFactJack
Is the blower pushing air? I've had to replace the resistor in mine twice. Pretty simple fix.
Posted on 6/9/16 at 10:25 am to TheDrunkenTigah
quote:
TheDrunkenTigah
quote:
Is the blower pushing air? I've had to replace the resistor in mine twice. Pretty simple fix.
Yes blower is pushing air. Just not cool air when at a standstill.
Posted on 6/9/16 at 10:26 am to ThatsAFactJack
I'd clean the condenser and radiator first. I.e. wash it out being careful not to booger up the fins on the condenser and radiator. A spray nozzle on a water hose will booger them up from close range.
Also check or replace the cabin air filter, won't matter much on hot air vs. cold air but will restrict cool airflow over the evap (that is if your vehicle has such a filter).
Also check or replace the cabin air filter, won't matter much on hot air vs. cold air but will restrict cool airflow over the evap (that is if your vehicle has such a filter).
This post was edited on 6/9/16 at 10:28 am
Posted on 6/9/16 at 10:34 am to ThatsAFactJack
quote:ok. Not sure what it is then.
Fan comes on when ac compressor engages. I assume radiator fan is coming on also since car does not overheat
Posted on 6/9/16 at 10:35 am to meauxjeaux2
quote:
meauxjeaux2
quote:
get the 4 seasons dual fan and change it out yourself
How difficult/easy is that to do? I am not mechanically inclined and have no mechanic tools.
Posted on 6/9/16 at 10:37 am to ThatsAFactJack
you said the fans come on. I don't think this is your issue.
Posted on 6/9/16 at 10:39 am to ThatsAFactJack
quote:
Yes blower is pushing air. Just not cool air when at a standstill.
Gotcha, mine would cool but air would only forced through when moving. Sounded a little like what you were describing. Apparently a common problem with GMs in that age range.
Posted on 6/9/16 at 10:48 am to meauxjeaux2
quote:
meauxjeaux2
quote:
you said the fans come on. I don't think this is your issue.
Could it be as simple as being low on Freon and a recharge kit would fix it? or is that usually just a temporary fix?
Posted on 6/9/16 at 10:52 am to ThatsAFactJack
Could also be your compressor going bad. Similar experience with a 2007 Saturn Vue. Had the Honda 3.5L in it but used a GM AC system. AC just wouldn't cool at low speed or idling but would cool when up to speed. That was mainly because of engine RPM not the car moving. The high side would leak through the compressor to the low side so the compressor couldn't get the high side pressure up until the engine RPMs increased. Easy to check. Put a gauge on the low pressure port. When the car on and AC on full blast the low side pressure should be around 40psi give or take depending on air humidity and temperature. If it's like 65psi with the car idling and doesn't drop until the RPMs increase your compressor is going bad.
Posted on 6/9/16 at 11:04 am to ThatsAFactJack
Might as well check it. Mine did similar things when it was low
Posted on 6/9/16 at 11:04 am to ThatsAFactJack
quote:highly unlikely. When the air stops blowing cold you need to open up the hood and verify the compressor clutch is engaged.
Could it be as simple as being low on Freon and a recharge kit would fix it? or is that usually just a temporary fix?
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