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Post by Naeos_Valkarian on Apr 14, 2018 19:18:00 GMT -5
To sum it up, I've been having trouble with my A/C not blowing cold since I got my sport a few years ago. It's finally time to invest in fixing it.
Symptoms:
Blows warm air during the day and sometimes cool at night, morning, and during rain. Will also barely dehumidify enough to help when windows fog up.
Diag revealed the following:
Low Side: 11~15psi
High Side: 210~225psi
Tested Ambient: 80°~85°
Things I've done:
* Replaced compressor with junk yard OEM unit because old one was beginning to rattle. (verified system was still sealed before pulling and clutch is functioning correctly)
* Installed new belt and vacd/recharged according to fsm specifications. (I did purge air from service line before charging)
System performance remained the same after replacing the compressor so it has to be something else right?
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Post by jkdv8 on Apr 15, 2018 11:25:14 GMT -5
Receiver dryer may be clogged. Have you checked it and/or the dual pressure switch.
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Post by Naeos_Valkarian on Apr 15, 2018 14:11:14 GMT -5
Receiver dryer may be clogged. Have you checked it and/or the dual pressure switch. Forgot to mention the reciever drier was replaced last year when I vacd and recharged in an attempt to fix this issue. I could try replacing the switch but I'm not sure where it's located or what the part number is. I'll have to wait till I can get home and look at my fsm. |
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Post by Naeos_Valkarian on Apr 15, 2018 19:50:35 GMT -5
Seems the switch is located on top of the receiver dryer and its part number is MR360872. So far it seems it's only going to be a dealership item as nowhere even has aftermarket. Perhaps I can find an 04 model in the junk yard so it'll be newer than the normal pickings otherwise it's $60 for a new one.
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Post by jkdv8 on Apr 16, 2018 15:57:08 GMT -5
Yea it's on top of the RD. "They" say the RD should be replaced every time the system is serviced, opened, or after a certain period of time. Don't know how legitimate that is but technically it is a filter.
I would test before you replace the switch. The procedure is in the manual.
Also if you have to do it again check the outlet temps periodically as you're filling and let it run for 10-15 minutes in-between.
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Post by Naeos_Valkarian on Apr 18, 2018 11:59:33 GMT -5
Well my AC just quit on me yesterday. I popped the hood to look around today and I found my high pressure lines leading from the compressor had ruptured. This new information leads me to belive the expansion valve or condensor may be to blame. Guess I'll just save up for awhile and replace everything.  |
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Post by Naeos_Valkarian on Apr 28, 2018 21:58:14 GMT -5
does anyone by chance know if the discharge line from the compressor to the condenser is the same in both gens? I can't seem to find any information about it online anywhere.
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Post by jkdv8 on Apr 29, 2018 14:10:24 GMT -5
I believe they are engine specific, possibly trans and year specific. Look at MR240780. If I remember correctly the discharge line goes from the compressor to receiver drier.
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Post by Naeos_Valkarian on Apr 29, 2018 17:18:31 GMT -5
I believe they are engine specific, possibly trans and year specific. Look at MR240780. If I remember correctly the discharge line goes from the compressor to receiver drier. Look like this is the correct part number, thank you so much. Found a new one for sale on Fleabay for $25  |
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Post by Naeos_Valkarian on May 12, 2018 20:10:37 GMT -5
Replaced the busted ac line and wound up creating what looks to be a stress fracture on the low pressure line on the evaporator core when I tried to replace the expansion valve. Looks like a new evap core is now on the way. Tip of the day! When removing the expansion valve use a wrench on both the valve and the nut, don't try just putting pressure on the nut cause you'll bend the lines.  ![]()  |
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Post by Naeos_Valkarian on May 14, 2018 21:08:20 GMT -5
Replaced the evaporator core and expansion valve today and voila my ac is blowing cold. I wouldn't say it blows super cold but I think it needs more refrigerant as the sight glass isn't super clear while the ac is running.
and yes I added some PAG oil to the service line before adding refrigerant I could replenish what was lost.
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Post by ES_97Sport on May 15, 2018 16:06:12 GMT -5
... When removing the expansion valve use a wrench on both the valve and the nut, don't try just putting pressure on the nut cause you'll bend the lines. .... Ouch! Edward |
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Post by Naeos_Valkarian on May 15, 2018 16:11:26 GMT -5
... When removing the expansion valve use a wrench on both the valve and the nut, don't try just putting pressure on the nut cause you'll bend the lines. .... Ouch! Edward At least I was able to see that the system is spotless. not a trace of dessicant was seen when I took everything apart, pretty much had a stuck closed expansion valve which caused the issue. Honestly I shoulda used common sense when trying to remove the expansion valve but it was so darn hot out (95F + Humidity) and I was little mad because I had to remove the front bumper cover and grille and finagle that bad line out and the new one in with next to no space so I didn't have my thinking cap on at the time.  |
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Post by Naeos_Valkarian on May 20, 2018 19:31:38 GMT -5
Alrighty, I finally got around to adding more refrigerant to the system (maybe less than 1/4th of a can?) and now my ac is blowing nice and chilly. However ever since the evap core and expansion valve was changed I occasionally hear a hissing noise accompanied by better ac performance (temps drop maybe 5 degrees or more for a bit). I won't be able to get accurate pressure readings as my manifold gauges are malfunctioning so I need to borrow a set from someone later in the week. any ideas?
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Post by jkdv8 on May 20, 2018 21:16:51 GMT -5
Glad you got it working. Been a little warm out lately to be without A/C. Check the pressures when you can.
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