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AC compressor issue (video) #4498520
08/26/17 09:55 AM
08/26/17 09:55 AM
Joined: Mar 2014
Posts: 5
NJ
civhatch90 Offline OP
civhatch90  Offline OP
Joined: Mar 2014
Posts: 5
NJ
Car is a 2007 Mazdaspeed 3, 100% stock , 180k miles.

Today coming from work all of the sudden the car starts blowing hot air and I check the temperature gauge to realize the needle is 3/4 of the way up, very close to the H. I turn the heating on max and the car begins to cool down.

Pull over and when the AC is on, this is what the compressor is doing: https://www.youtube.com/watch?v=d_QuhECEhyM

I should note I have not seen the radiator fan come on, either when the AC was or on off and the car was fully warmed up and the temperature gauge was higher than normal. Is this related to the AC issue?

A week later: Found a clutch/bearing replacement in Amazon and installed it this past weekend. The clutch appears to no longer "slip" but it does turn on and off as it pleases. Here is a video: https://www.youtube.com/watch?v=wMlhTfqfHkQ AC was on all the time while recording the video.

Before this all happened the car was blowing ice cold air, so I assume it is not an issue with lack of refrigerant in the system.

Any feedback is appreciated before my last resort which would be to take it to a shop.

Thanks!

Re: AC compressor issue (video) [Re: civhatch90] #4498531
08/26/17 10:09 AM
08/26/17 10:09 AM
Joined: Sep 2007
Posts: 968
TX, USA
JMJNet Offline
JMJNet  Offline
Joined: Sep 2007
Posts: 968
TX, USA
Did you measure the pressure on hi and lo side?
These measurement will determine if the compressor is good or bad.

Last edited by JMJNet; 08/26/17 10:09 AM.

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Re: AC compressor issue (video) [Re: civhatch90] #4498542
08/26/17 10:22 AM
08/26/17 10:22 AM
Joined: Sep 2014
Posts: 1,446
Toronto Canada
WobblyElvis Offline
WobblyElvis  Offline
Joined: Sep 2014
Posts: 1,446
Toronto Canada
First you should address the fact the cooling fans have not come on as you don't want to over heat the engine. Most modern automobiles will shut off the air conditioning should the engine go over a pre determined temperature. This is probably why the AC shut down in the first place.

Re: AC compressor issue (video) [Re: civhatch90] #4498543
08/26/17 10:22 AM
08/26/17 10:22 AM
Joined: Sep 2015
Posts: 1,528
USA
mk378 Offline
mk378  Offline
Joined: Sep 2015
Posts: 1,528
USA
Does the A/C operate properly when the car is moving? When the car is moving, air is forced through the condenser and radiator, so it does not matter that the fan does not work.

The compressor appears to be tripping off due to high pressure, because the condenser fan does not work. With no airflow the high side pressure rises very high and the controls will disengage the compressor to protect it.

The condenser fan must come on when the car is sitting still with the A/C on. It may not stay on constantly, but it should be on at least part of the time.

Re: AC compressor issue (video) [Re: mk378] #4498574
08/26/17 10:54 AM
08/26/17 10:54 AM
Joined: Mar 2014
Posts: 5
NJ
civhatch90 Offline OP
civhatch90  Offline OP
Joined: Mar 2014
Posts: 5
NJ
Originally Posted By: JMJNet
Did you measure the pressure on hi and lo side?
These measurement will determine if the compressor is good or bad.


Unfortunately I do not. I know working on an AC issue without the gauges is difficult but due to the AC working at highway speeds I am assuming the compressor works and the system is properly charged.

Originally Posted By: WobblyElvis
First you should address the fact the cooling fans have not come on as you don't want to over heat the engine. Most modern automobiles will shut off the air conditioning should the engine go over a pre determined temperature. This is probably why the AC shut down in the first place.


Originally Posted By: mk378
Does the A/C operate properly when the car is moving? When the car is moving, air is forced through the condenser and radiator, so it does not matter that the fan does not work.

The compressor appears to be tripping off due to high pressure, because the condenser fan does not work. With no airflow the high side pressure rises very high and the controls will disengage the compressor to protect it.

The condenser fan must come on when the car is sitting still with the A/C on. It may not stay on constantly, but it should be on at least part of the time.


I think you two may have hit the nail on the head. I went for a 20 minute ride after reading your feedback and as the car was moving the AC kept blowing cold air. I stopped twice on the drive and the fan was never on. Your feedback will shift my focus from the AC system to the cooling fan. Worth noting the car only has one radiator fan and it did not overheat during the drive, temp gauge stayed where it usually did before this all started.

Off I go to read up on diagnosing the cooling fan.

Last edited by civhatch90; 08/26/17 10:56 AM.
Re: AC compressor issue (video) [Re: civhatch90] #4498583
08/26/17 11:02 AM
08/26/17 11:02 AM
Joined: Sep 2016
Posts: 1,418
Minnesota
bioburner Offline
bioburner  Offline
Joined: Sep 2016
Posts: 1,418
Minnesota
Check the fan connections, fuse or breaker and wiring first. Look for the easy stuff 1st. I had a similar issue with a Taurus with fan not operating and I had done a rad repair in February and forgot to reconnect the fan and since most of my driving is freeway or open road was not an issue till I did some in town driving after 3 hour freeway drive on a hot July day. whistle

Last edited by bioburner; 08/26/17 11:13 AM.


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Re: AC compressor issue (video) [Re: civhatch90] #4498703
08/26/17 01:31 PM
08/26/17 01:31 PM
Joined: Jun 2003
Posts: 17,355
Deplorable in apple valley, ca
Chris142 Offline
Chris142  Offline
Joined: Jun 2003
Posts: 17,355
Deplorable in apple valley, ca
You have to fix the cooling fan asap. It will destroy the compressor if you dont.

Last edited by Chris142; 08/26/17 01:31 PM.

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Re: AC compressor issue (video) [Re: JMJNet] #4498746
08/26/17 02:37 PM
08/26/17 02:37 PM
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Merkava_4 Offline
Merkava_4  Offline
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Originally Posted By: JMJNet
Did you measure the pressure on hi and lo side?
These measurement will determine if the compressor is good or bad.


A bad compressor with show higher than normal low side pressures; am I correct ?


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