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Old 08-08-2018, 06:54 PM  
petegz28 petegz28 is offline
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Car AC Compressor Question..

Wife's SUV was blowing cold air this morning and won't blow anything but hot air now. I threw an AC recharge can on but noticed even with the compressor clutch engaged, the pressure is still in the red. I would expect it to drop once the clutch engages.

Am I looking at a bad compressor even though the clutch is engaging?

Weird part is even with the AC off and the temp set at 70 or so, it feels like I am just getting hot air. Thought maybe the door thing that's supposed to change was not working but the pressure issue makes me think it's the compressor.

Any ideas or insight is appreciated.
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Old 08-08-2018, 08:45 PM   #31
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Old 08-08-2018, 08:47 PM   #32
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By no means am I anywhere near as knowledgeable as a lot of guys here, but a hot accumulator means you need to charge the system, flush the system, or lastly change the compressor.

Good news is that it’s fairly simple to change, at least it is on the vehicles I have done (90 Chevy pickup, 94 suburban, 01 Yukon), but you will need some wrench turning experience to pull it off.

Wait for someone who really knows though. I am willing to give my own gear a go, but I don’t want to waste someone else’s time and money.
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Old 08-08-2018, 09:00 PM   #33
petegz28 petegz28 is offline
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By no means am I anywhere near as knowledgeable as a lot of guys here, but a hot accumulator means you need to charge the system, flush the system, or lastly change the compressor.

Good news is that it’s fairly simple to change, at least it is on the vehicles I have done (90 Chevy pickup, 94 suburban, 01 Yukon), but you will need some wrench turning experience to pull it off.

Wait for someone who really knows though. I am willing to give my own gear a go, but I don’t want to waste someone else’s time and money.
I thought it might need a charge but to go from fine to not fine in less than an afternoon? Unless I have a big leak somewhere. Plus I know on my Camaro when it did lose charge, the compressor wouldn't even engage until I charged it up.
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Old 08-08-2018, 09:03 PM   #34
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Sounds like you have lost a control to the servo motor that opens the damper that allows air across the evaporator coil as well as the fresh air. It also sounds like you have a blockage with the flow of freon.
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Old 08-08-2018, 09:05 PM   #35
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Sounds like you have lost a control to the servo motor that opens the damper that allows air across the evaporator coil as well as the fresh air.
That's what I was wondering. That happened in my old Maxima. In fact the entire ac system from servo to compressor all shot craps on that one. The dealer just replaced the radio in this so I don't know how that all works but I wonder if that had something to do with it since they had the console torn apart? It did work for a few days after we got it back but.....
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Old 08-09-2018, 05:44 AM   #36
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Extended warranty ftw

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Old 08-09-2018, 06:31 AM   #37
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That's what I was wondering. That happened in my old Maxima. In fact the entire ac system from servo to compressor all shot craps on that one. The dealer just replaced the radio in this so I don't know how that all works but I wonder if that had something to do with it since they had the console torn apart? It did work for a few days after we got it back but.....

Have you turned it to heat to see if the air coming out of the vents change temp? then cycle it back to cool, listen for compressor to click on and air cool off? You can also usually hear the blend door actuator engage. also while your at it make sure the air is coming through the appropriate vents and not partially between different outlets such as vents and partially floor or defrost.
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Old 08-09-2018, 06:42 AM   #38
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Old 08-09-2018, 06:45 AM   #39
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Have you turned it to heat to see if the air coming out of the vents change temp? then cycle it back to cool, listen for compressor to click on and air cool off? You can also usually hear the blend door actuator engage. also while your at it make sure the air is coming through the appropriate vents and not partially between different outlets such as vents and partially floor or defrost.
Yep, tried all that...can't really hear the door though
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Old 08-09-2018, 06:49 AM   #40
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So I got down and looked at the compressor while it was running..the outside is rotating fine but the front has a bunch of tar looking stuff around the edge and the middle part is barely turning at all. Not sure if that's normal or not but it doesn't look normal....
this tells us all we need to know.


the clutch is fried.


what do you drive?
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Old 08-09-2018, 06:56 AM   #41
petegz28 petegz28 is offline
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this tells us all we need to know.


the clutch is fried.


what do you drive?
2013 Ford Explorer. Just had a bunch of work done and one thing they did was replace the radio. So I was just curious if they ****ed up something there since that's where all the climate controls and such are as well.
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Old 08-09-2018, 07:05 AM   #42
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Old 08-09-2018, 07:23 AM   #43
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2013 Ford Explorer. Just had a bunch of work done and one thing they did was replace the radio. So I was just curious if they ****ed up something there since that's where all the climate controls and such are as well.
sounds to me like the clutch melted. it should be turning the same speed as the pulley when engaged.
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Old 08-09-2018, 07:31 AM   #44
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Okay yeah, it's all hot. All the lines are hot. And when you look at the compressor head on, the inside is barely spinning even though the outside is cranking away.
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sounds to me like the clutch melted. it should be turning the same speed as the pulley when engaged.
This. Clutch is fried so essentially compressor never engages. My AC guy was able to get just a clutch for our semi but I’d bet you’re getting a new compressor.

Be sure to ask though. It’s way cheaper and they don’t have to Vacuum the system.
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Old 08-09-2018, 07:49 AM   #45
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sounds to me like the clutch melted. it should be turning the same speed as the pulley when engaged.
That's sort of what I thought. Well, it goes in tomorrow. Thanks for the insight.

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