Yep, got to know ^this^ before doing any other troubleshooting.

The compressor has an electromagnetic clutch that allows the compressor pulley to "freewheel" independent of the compressor driveshaft when the system is not calling for cooling. If the clutch is not engaging, the compressor will not spin and therefore will not provide cooling. This could be caused by low refrigerant, or it could be a controls/wiring issue. Alternatively, it's possible for the compressor to seize, in which case the clutch may be engaged, yet unable to spin because the compressor is locked up. That will cause the accessory drive belt to slip over the compressor pulley, and you'll definitely be able to smell the belt heating up/burning if that's the case.

In response to this post by HokieSignGuy

Posted: 09/01/2021 at 12:41PM

Vehicle A/C Question. 2016 GMC Acadia A/C no longer producing cold air. -- Late 80s Hokie 09/01/2021 12:10PM

I have a 1987 Porsche that's had cold A/C for over 15 years, so that kinda -- Galenahokie 09/02/2021 07:45AM

Two things- -- YardBird 09/01/2021 10:13PM

I would have it checked by a reputable shop -- EDGEMAN 09/01/2021 6:11PM

Do a relay swap with another system relay with same rating. If it works… -- Old Village Hokie 09/01/2021 3:10PM

My air re charge on my lexus worked like a charm. -- GreenvilleVT 09/01/2021 3:06PM

Your best option is refill with freon and have them put dye in it. If it -- jdkhokie 09/01/2021 3:04PM

Buy a toyota ** -- HokieDan95 09/01/2021 1:36PM

This,. Wife had 2 different Acadias whose tranny went out around 100K mi. -- Victory Ticker 09/01/2021 4:15PM

I've had generally good luck with the Hondas, Nissan, and Mazda I've owned -- Tafkam Hokie 09/01/2021 5:05PM

Try a can of AC Pro first before getting it fixed ** -- Apex-Hokie 09/01/2021 1:31PM

This is the correct answer. ** -- GreenvilleVT 09/01/2021 3:13PM

Open all windows? ** -- FfxStationHokie 09/01/2021 1:12PM

For my Sentra it was the radiator -- TomTurkey 09/01/2021 12:54PM

Does your compressor turn on when you turn the AC on? you will hear your -- HokieSignGuy 09/01/2021 12:21PM

Sounds like a johnson rod ** -- bigbadbird 09/01/2021 12:50PM

…could also be the thermostat bearings ** -- chumley 09/01/2021 2:43PM

Probably a dimrod! 😵‍💫 ** -- Hoakie82 09/01/2021 6:08PM

Not sure about hearing the compressor / clutch engage. It wasn't very -- Late 80s Hokie 09/01/2021 12:48PM

That sounds like a gradual leak due to seals drying out. -- MP4VT2004 09/01/2021 1:49PM

I do that too. I'll run the AC during the winter when we have "warm" days -- EDGEMAN 09/01/2021 6:14PM

Yep, got to know ^this^ before doing any other troubleshooting. -- MP4VT2004 09/01/2021 12:41PM

It's almost winter - relax ** -- bigbadbird 09/01/2021 12:20PM

Yep, got to know ^this^ before doing any other troubleshooting.

Insert a Link

Tech Sideline is Presented By:

Our Sponsors