Life Car AC Compressor Question.. - Page 2

**petegz28** · 08-08-2018, 06:54 PM

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.

hotrod · 08-08-2018, 07:56 PM

You really need to get a set of manifold gauges hooked to it. those little gauges that come on a can are not accurate and are often very wrong. you really need to be able to see both the high side and low side to diagnose.

**notorious** · 08-08-2018, 07:57 PM

Is the condenser cold to the touch or hot?

It’s an SUV, sometime the rear controls can affect how the front blows cool air.

I have a 2001 Yukon XL for an employee. If the rear controls are off it won’t blow cool air. There is a connection behind the rear right plastic panel when dirty will stop the rear from blowing air.

stumppy · 08-08-2018, 07:59 PM

Quote:

Originally Posted by petegz28

Says cooling system is covered. But I know what you mean the ****ing thing was just in the shop for over a week getting the panoramic roof replaced and they made sure to tell me glass is not covered

Sent from my SM-G950U using Tapatalk

Might want to read that again. Cooling system generally refers to the engine cooling system, water pump, radiator. An a/c compressor would fall under the heating/ac system.

Depends on the warranty company on how they word it.

**petegz28** · 08-08-2018, 08:03 PM

Quote:

Originally Posted by notorious

Is the condenser cold to the touch or hot?

It’s an SUV, sometime the rear controls can affect how the front blows cool air.

I have a 2001 Yukon XL for an employee. If the rear controls are off it won’t blow cool air. There is a connection behind the rear right plastic panel when dirty will stop the rear from blowing air.

checked the rear controls....didn't touch the condenser but the lines are hot

Fish · 08-08-2018, 08:09 PM

Quote:

Originally Posted by stumppy

Might want to read that again. Cooling system generally refers to the engine cooling system, water pump, radiator. An a/c compressor would fall under the heating/ac system.

Depends on the warranty company on how they word it.

**notorious** · 08-08-2018, 08:25 PM

Quote:

Originally Posted by petegz28

checked the rear controls....didn't touch the condenser but the lines are hot

I’m sorry, I meant to say “accumulator” instead of condenser.

**petegz28** · 08-08-2018, 08:26 PM

Quote:

Originally Posted by notorious

I’m sorry, I meant to say “accumulator” instead of condenser.

I don't know what that is.....

**petegz28** · 08-08-2018, 08:27 PM

Quote:

Originally Posted by stumppy

Might want to read that again. Cooling system generally refers to the engine cooling system, water pump, radiator. An a/c compressor would fall under the heating/ac system.

Depends on the warranty company on how they word it.

Quote:

Originally Posted by Fish

I double checked....it says cooling system and air conditioning so yeah, cooling system is not AC but AC seems to be covered.

**petegz28** · 08-08-2018, 08:29 PM

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....

**notorious** · 08-08-2018, 08:29 PM

Quote:

Originally Posted by petegz28

I don't know what that is.....

Should be mounted near the firewall and it’s the size of a jar of spaghetti sauce or large beer can with several lines going in and out.

Here is a pic of a Yukon accumulator.

**Bwana** · 08-08-2018, 08:29 PM

Quote:

Originally Posted by petegz28

I don't know what that is.....

The AC accumulator is a metal canister that acts as a filter for the AC system. It is filled with desiccant, a moisture absorbing material.

**notorious** · 08-08-2018, 08:30 PM

Of course Sauto is out tonight. Dude would have had it pegged in one post while I fumble around all over the place.

**Bwana** · 08-08-2018, 08:32 PM

Quote:

Originally Posted by notorious

Of course Sauto is out tonight. Dude would have had it pegged in one post while I fumble around all over the place.

Heh, yeah he was here earlier but he's not on right now.

**petegz28** · 08-08-2018, 08:33 PM

Quote:

Originally Posted by notorious

Should be mounted near the firewall and it’s the size of a jar of spaghetti sauce or large beer can with several lines going in and out.

Here is a pic of a Yukon accumulator.

Quote:

Originally Posted by Bwana

The AC accumulator is a metal canister that acts as a filter for the AC system. It is filled with desiccant, a moisture absorbing material.

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.

**petegz28** · 08-08-2018, 08:35 PM

The part that really stumps me is when I have it on just vent it blows just hot air. You'd think the cooler air from outside would be more of what I feel with the thermostat set at 68 or so.

08-08-2018, 06:54 PM
petegz28 Supporter Join Date: Feb 2005 Location: Olathe, Ks Casino cash: $2794127	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.
Posts: 128,000

08-08-2018, 07:56 PM	#16
hotrod Starter Join Date: Aug 2018 Casino cash: $10000400	You really need to get a set of manifold gauges hooked to it. those little gauges that come on a can are not accurate and are often very wrong. you really need to be able to see both the high side and low side to diagnose.
Posts: 806

08-08-2018, 07:57 PM	#17
notorious Supporter Join Date: May 2005 Location: Who knows? Casino cash: $2925884	Is the condenser cold to the touch or hot? It’s an SUV, sometime the rear controls can affect how the front blows cool air. I have a 2001 Yukon XL for an employee. If the rear controls are off it won’t blow cool air. There is a connection behind the rear right plastic panel when dirty will stop the rear from blowing air.
Posts: 83,365

08-08-2018, 08:29 PM	#24
petegz28 Supporter Join Date: Feb 2005 Location: Olathe, Ks Casino cash: $2794127	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....
Posts: 128,000

08-08-2018, 08:30 PM	#27
notorious Supporter Join Date: May 2005 Location: Who knows? Casino cash: $2925884	Of course Sauto is out tonight. Dude would have had it pegged in one post while I fumble around all over the place.
Posts: 83,365

08-08-2018, 08:35 PM	#30
petegz28 Supporter Join Date: Feb 2005 Location: Olathe, Ks Casino cash: $2794127	The part that really stumps me is when I have it on just vent it blows just hot air. You'd think the cooler air from outside would be more of what I feel with the thermostat set at 68 or so.
Posts: 128,000