A/C blowing warm/hot air?

[brooklynA42004]

AC worked in the afternoon(icy cold) took it out 2 hours later only warm/hot air coming out, checked both fuses and are good. Fans usually sound like I'm ready to take off but I noticed they are pretty quite but on. Anything else I can check myself before taking to shop?

[chain_slappins4]

check pressure in system.. could have a leak

Sent from the S4 with a Tap!!!

[brooklynA42004]

check pressure in system.. could have a leak

Sent from the S4 with a Tap!!!

will do but it can go from cold to hot in 2 hours its not even cool its warm air?

[chain_slappins4]

yeah man.. I've had my schedule blowing ice cold, went in store to get a pack of smokes and when I turned it back on. it was a wrap.. blowing hot..

Sent from the S4 with a Tap!!!

[brooklynA42004]

yeah man.. I've had my schedule blowing ice cold, went in store to get a pack of smokes and when I turned it back on. it was a wrap.. blowing hot..

Sent from the S4 with a Tap!!!

thanks for the reply hope that's what it is and not the compressor.

[chain_slappins4]

compressor would USUALLY make some kind of noise before shitting the bucket..

Sent from the S4 with a Tap!!!

[Blackstallion]

my vote goes to compressor - keep us posted...

[pandapod]

I have a similar problem...A/C works for 1-2 hours then warm air. Happens regularly, and has been happening for over a year now...I do have the tools to vacuum out the line and recharge with R134a so i may try that this week and will let you know what i find out.

[QIKRNU]

I have a similar problem...A/C works for 1-2 hours then warm air. Happens regularly, and has been happening for over a year now...I do have the tools to vacuum out the line and recharge with R134a so i may try that this week and will let you know what i find out.

Sounds like you might need a little more freon. A low charge will cause the evaporator to freeze up. Happened to me a couple years ago. Added some and the problem went away.

[Whtnrdy]

I am having a similar issue but it is only happening to the passenger side. Even though the driver side stays ice cold, the passenger side is warm with the same temp stpt. I believe my issue is either with the blending damper or the zone temperature sensor. If the damper is sticking and not moving to the correct position, the air could be warmer than it is supposed to be. Or if the temp sensor has drifted and is reading a value lower than actual, the damper will not be commanded to a position that will be cold enough.

It is possible that the evaporator is freezing up, however if this is the case you wouldn't necessarily lose cold air but you would lose the majority of your airflow all together because the path through the coil would be blocked. If the fan speed indicator is at full speed, but you feel little air than I would think that this could be the case. If the fan speed is at minimum when you expect it to be at maximum than again I would point to the temp sensors.

I haven't started to troubleshoot mine yet but I did just get the VCDS software and cable and it appears that you can look at the damper command and feedback position. So checking for a sticking damper should be able to be done through the software. I am not sure about the temperature sensors however.

Does anyone know if the dampers are electric or use pneumatic/vacuum to operate?

[roboto_1337]

I had the same problem today... 35deg C. It started working after blowing hot for 15 mins

[brooklynA42004]

took it to a indy said it was the A/C high pressure sensor $65 waiting to get it back today.

[brooklynA42004]

update: ended up being the compressor :( getting it done now $700

[AllroadMass]

How did they know it was the compressor? I'm having similar issues.

That sounds really cheap for a reman compressor and labor...

[brooklynA42004]

How did they know it was the compressor? I'm having similar issues.

That sounds really cheap for a reman compressor and labor...

mine just stopped working didn't have any issues, looks like the clutch on the compressor was cracked. Rockauto.com has compressors starting around $200-300

[QIKRNU]

Our cars don't have a clutch on the compressor; it is shaft driven and runs full time.

[brooklynA42004]

I guess it was the shaft that was broken whatever it was it was in a few pieces, have pics of the broken part but couldn't upload.

[brooklynA42004]

Pic

[brooklynA42004]

Honestly I think this is a $500 job $200 for compressor and 4 hours labor.

[roboto_1337]

http://www.agcoauto.com/content/news/p2_articleid/257

Found that article, seem good to help understand what's happening with your A/C based on high and low side pressures. Should also help and DIY'ers with little knowledge of HVAC how to not make problems worse.