Jump to content
Search In
  • More options...
Find results that contain...
Find results in...
mkessler9

Car a/c blows warm at idle and cool when driving. HELP!!

Recommended Posts

Posted · Original PosterOP

Ok so I have a Chevy Trailblazer 2004 vehicle. In the past the air conditioner has worked fine at idle(I think, don't remember since the last time I used the a/c was last year). 

 

I literally just checked the a/c pressure about 20mins ago and the pressure is normal for the temperature outside. So if its not the pressure being low then what is it? I wouldn't think it would be the compressor since it gets cold air when driving. 

 

I would think it could be not enough air is passing through the condenser at idle but that wouldn't make since because why would Chevy make it so that the default setup doesn't blow cold at  idle?

 

So what do you think could be the problem? 

 

Thanks.


Gaming rig- Cpu- Amd 9590, 16gbs of G Skill Ram, Gpu- GTX 760 windforce 3 edition 2gb. A Thermaltake water 2.0 water cooler for my cpu. Keyboard- Thermaltake Posieden , Case- 750D, Mobo Asus 990fx R2.0. 24 inch Dell LED monitor

Link to post
Share on other sites

Found this from another forum for ya'.

 

the pressure is most likely shooting up due to a weak fan clutch.no airflow over the condenser will make the ac suck

Link to post
Share on other sites

Usually I let my car idle for about 5-10 before turning on my A/C (2014 Mustang V6) because it doesn't blow cold air as soon as you turn it on. Then again, I only do that in the summer.


ACS Systems - Jason Neal

My "Danger Den" PC: i7-4960x @ 4.5Ghz, ASUS X79 Deluxe, 3x GTX Titan Black, 6x m4 512GB, 64GB Corsair DDR3-2400, Corsair AX1500i

Black Beauty Workstation/LAN PC: i5-4570 @ 3.79 GHz, ASRock Z87E-ITX, XFX Double D R9-280 (Non-X), GSkill 8GB DDR3-2400

Link to post
Share on other sites

Sounds like the fan over the condenser. 


Case: Fractal Design Define R4 MB: MSI Z77A-GD55  CPU: i5 3330 OCd to 3.4Ghz CPU Cooler: Corsair H100i RAM: Kingston HyperX Blu 2x8GB @ 1600MHz GPU: Gigabyte GTX 970 G1 Gaming PSU: Seasonic M12II 650W HDD: Two Seagate Barracuda 2TB @ 7200 RPM SSD: Samsung 840 EVO 250GB

Link to post
Share on other sites

Is it possible that you might have to recharge it?

 

SIDENOTE: We had a 1994 Buick Roadmaster Custom, and whenever my dad charged the A/C up, if you drove it around and had it on max, frost would form on the events, even though it would be 32-33C outside. The heater sucked in it though.


Laptop: Latitude E4310 w/ i5 580M, 8GB RAM, 120GB 840 EVO, Intel Centrino Ultimate-N 6300 wireless card, Windows 7 Pro x64

Main PC: sleeper Dell on profile boi

Zeus: 2x 1266MHz PIII, Supermicro P3TDDE, 1x 512MB PC133 ECC, Radeon 9600 Pro 128MB, 30GB DiamondMax Plus 8 + 80GB IBM DeskStar, Windows XP Pro SP3

 

On 2/26/2019 at 2:37 AM, campy said:

when my girlfriend comes over and sees my dining room and kitchen counters covered in pc parts from pre 2006 she immediately takes off her clothes

nothing sexual, she just doesnt want the nerd dust on her clothes 

Link to post
Share on other sites
Posted · Original PosterOP

Usually I let my car idle for about 5-10 before turning on my A/C (2014 Mustang V6) because it doesn't blow cold air as soon as you turn it on. Then again, I only do that in the summer.

Yea but for me its anytime the car is at idle. No matter if it's just been started or if its been running for two hours and I come to a stop.

 

Found this from another forum for ya'.

 

the pressure is most likely shooting up due to a weak fan clutch.no airflow over the condenser will make the ac suck

 

Sounds like the fan over the condenser. 

That's what I was thinking with the airflow. But its the stock fan and hasn't changed since it was bought, and the fan seems to blow tons of air. Its just really hot (which is normal). But if it wasn't enough airflow wouldn't the engine be overheating too since the engine radiator needs tons of air to?


Gaming rig- Cpu- Amd 9590, 16gbs of G Skill Ram, Gpu- GTX 760 windforce 3 edition 2gb. A Thermaltake water 2.0 water cooler for my cpu. Keyboard- Thermaltake Posieden , Case- 750D, Mobo Asus 990fx R2.0. 24 inch Dell LED monitor

Link to post
Share on other sites
Posted · Original PosterOP

Is it possible that you might have to recharge it?

 

SIDENOTE: We had a 1994 Buick Roadmaster Custom, and whenever my dad charged the A/C up, if you drove it around and had it on max, frost would form on the events, even though it would be 32-33C outside. The heater sucked in it though.

The pressure in the system is normal. I just checked it about a half an hour ago as I said earlier. So it isn't low pressure causing it. I planned on just taking it to my local autoshop tomorrow but wanted to consult with you guys first.


Gaming rig- Cpu- Amd 9590, 16gbs of G Skill Ram, Gpu- GTX 760 windforce 3 edition 2gb. A Thermaltake water 2.0 water cooler for my cpu. Keyboard- Thermaltake Posieden , Case- 750D, Mobo Asus 990fx R2.0. 24 inch Dell LED monitor

Link to post
Share on other sites

The pressure in the system is normal. I just checked it about a half an hour ago as I said earlier. So it isn't low pressure causing it. I planned on just taking it to my local autoshop tomorrow but wanted to consult with you guys first.

Oops. My bad. :P


Laptop: Latitude E4310 w/ i5 580M, 8GB RAM, 120GB 840 EVO, Intel Centrino Ultimate-N 6300 wireless card, Windows 7 Pro x64

Main PC: sleeper Dell on profile boi

Zeus: 2x 1266MHz PIII, Supermicro P3TDDE, 1x 512MB PC133 ECC, Radeon 9600 Pro 128MB, 30GB DiamondMax Plus 8 + 80GB IBM DeskStar, Windows XP Pro SP3

 

On 2/26/2019 at 2:37 AM, campy said:

when my girlfriend comes over and sees my dining room and kitchen counters covered in pc parts from pre 2006 she immediately takes off her clothes

nothing sexual, she just doesnt want the nerd dust on her clothes 

Link to post
Share on other sites

The pressure in the system is normal. I just checked it about a half an hour ago as I said earlier. So it isn't low pressure causing it. I planned on just taking it to my local autoshop tomorrow but wanted to consult with you guys first.

How did you check the pressures? You have a set of gauges?

Link to post
Share on other sites
Posted · Original PosterOP

How did you check the pressures? You have a set of gauges?

I had one of those gauges that you can attach to a bottle of the refrigerant and attached it to one of my extra bottles and ran the car with the a/c on high and attached it to the low pressure end of the system

Gaming rig- Cpu- Amd 9590, 16gbs of G Skill Ram, Gpu- GTX 760 windforce 3 edition 2gb. A Thermaltake water 2.0 water cooler for my cpu. Keyboard- Thermaltake Posieden , Case- 750D, Mobo Asus 990fx R2.0. 24 inch Dell LED monitor

Link to post
Share on other sites

Try resetting the uefi and retry the overclock start off with a slight undervold and work your way up. Try downloading more freon but stay away from the torent sites some of the freon is corupted with water.

Make sure the firewall isnt causing an issue. Try linux as microsofts latest car os has removed the compressor. they removed the compressor for this ne metro ice that turned out to be useless.

Lol though this was funny by the time u read this I will have had second thoughtsnon this post lol

Link to post
Share on other sites

Gm vehicles used clutch fans till late 07 got replaced later on with electric ones. Trail blazers usually have this problem too. This has nothing to do with to little refrigerant or pressure, as you drive the road things starts cooling down. Clutch fans are usually tied with the cars temperature. Now if the vehicle is cold and has been sitting to long the clutch won't apply.

I remember when I had 2001 Silverado which I replaced the fan shroud and clutch assembly with a electric harness to avoid over heating, better performance, reduced noise etc... Things get abit warm here man so good luck.


|Corsair AX1200i| |1440p PG279Q| |ASUS Hero IX Z270| |i7-7700k WC| |FE 2080Ti WC|Vengeance 32GB DDR4 LED | |Samsung 970 EVO M.2 1TB| |Samsung 960 EVO M.2 500GB |

 |Logitech MX Master|K70 Cherry MX Speed|  |Logitech Z906 |  |HD650|  |O2 Headphone Dac|

 

Link to post
Share on other sites

Most likely its a condenser fan, when your driving, the ram air is cooling the refrigerant inside the condenser, and at idle (stopped, no ram air) it isn't getting sufficient airflow for cooling, therefore not working. check the fans and see if they're cutting in and doing their normal cycle, check that the compressor clutch is cutting in, should be able to tell that quite easily. other than that take it to someone who can re-gas it, might be a clogged filter also, they'll change that out when doing the service, if they don't pick up on whats wrong, you've got yourself a bad tech. Diesel mechanic  finally came in with some useful advice on this forum. Yay for me. @pcmasterguy

 

Yea but for me its anytime the car is at idle. No matter if it's just been started or if its been running for two hours and I come to a stop.

 

 

That's what I was thinking with the airflow. But its the stock fan and hasn't changed since it was bought, and the fan seems to blow tons of air. Its just really hot (which is normal). But if it wasn't enough airflow wouldn't the engine be overheating too since the engine radiator needs tons of air to?

 the engine wouldn't necessarily overheat because of the overall larger rad, less airflow needed.


Corsair Graphite 230T Case , AMD A8 6600K 4-Core Processor cooled by a CoolerMaster Hyper 212X CPU Cooler, MSI A88X G45 Gaming Motherboard, Corsair Dominator Platinum 8GB 2133Mhz, Sapphire Radeon R9 280X Dual-X OC 3GB, Samsung 840 EVO Series 120GB SSD + Western Digital WD Green 1TB + 3x Toshiba 500GB HDD, Corsair CS750M Modular PSU,all cooled with 4 Case fans, Displayed in 1080p on a 50" Samsung LED Smart TV

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


×