S14 A/C problem - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

97SerevoSX · 06-24-2012, 05:28 PM

Hey all in short, I have a redtop Sr in my kouki. Wiring Specialties wiring harness. The A/C compressor will kick on just fine, R134a canister gauge shows good pressure when it's running, but the air never gets cold... I can swap an engine, take it apart and put it back together but I'm clueless to air conditioning..

KiLLeR2001 · 06-24-2012, 05:30 PM

Try moving the slider to cold. If it's on cold, the lever could actually be broken off from the adjuster. Happened with my car.

edit: Hmm just read that you have an S14, not sure if there is a manual lever for the hot/cool door mixer. If not, the mechanism itself might not be switching.

97SerevoSX · 06-24-2012, 05:54 PM

I think that is electric in the s14 or vacuum controlled. Either way, I hear it switch over and it isn't "heat" coming out of the vents. It's much cooler than that and when I slide it to hot it gets a lot hotter (like my heat does) so I don't think it's that..

Butcher240sx · 06-25-2012, 02:12 AM

How long if ever was the system exposed to outside air? Was the drier replaced and suction put on the system when charged?

97SerevoSX · 06-25-2012, 11:59 AM

Quote:

Originally Posted by Butcher240sx

How long if ever was the system exposed to outside air? Was the drier replaced and suction put on the system when charged?

Not for very long, maybe overnight while I had the compressor off to put the CodyAce bracket on. What's a drier? Also no..

Butcher240sx · 06-25-2012, 12:35 PM

the drier is a cannister conected to your ac lines near the condensor. it removes moisture from the refrigeriant.i replace mine if i open the system at all. open overnight is long enough to ruin it. Mine was $8 new. open it and install it right away and go get a proper ac charge so they can pull vacume on the system. that sounds like your problem.

97SerevoSX · 06-25-2012, 01:21 PM

Ahh right next to the battery (or where the battery used to be at least)? I will definitely try that. Is that something I can get at autozone?

Butcher240sx · 06-25-2012, 01:27 PM

Yes sir. Make sure to get the o rings on straight, on the S13 the pressure switch is attached and I had to move it to the new one. It's a very important part of the system.

97SerevoSX · 06-25-2012, 01:42 PM

Hmm what about on an S14. Mine's a 97 with all the original A/C stuff

Butcher240sx · 06-25-2012, 02:29 PM

Not sure, find the drier and if there is a switch and harness on it thas the same.

Butcher240sx · 06-25-2012, 02:34 PM

Nissan 240sx A/c Receiver-drier at Auto Parts Warehouse
This is the drier. Mine has 4ports and an inspection eye on the top. One port for press. switch, one line in, one line out, and one plugged.

ka4life87 · 06-26-2012, 12:31 PM

Did u draw a vaccum on ac system prior to filling freon? Will never get cold if air in system

Butcher240sx · 06-26-2012, 02:38 PM

It will get a little cold, but suction will assure a full fill and a drier will remove all the moisture making the system much more efficient.

***S14DB*** · 06-26-2012, 02:49 PM

Quote:

Originally Posted by ka4life87

Did u draw a vacuum on ac system prior to filling freon? Will never get cold if air in system

This is what I am thinking.

06-24-2012, 05:28 PM	#1
97SerevoSX Leaky Injector Join Date: Oct 2010 Location: Ky Posts: 89 Trader Rating: (2) Feedback Score: 2 reviews	S14 A/C problem Hey all in short, I have a redtop Sr in my kouki. Wiring Specialties wiring harness. The A/C compressor will kick on just fine, R134a canister gauge shows good pressure when it's running, but the air never gets cold... I can swap an engine, take it apart and put it back together but I'm clueless to air conditioning..

06-24-2012, 05:30 PM	#2
KiLLeR2001 Post Whore! Join Date: Jun 2007 Location: オーランドフロリダ Posts: 7,955 Trader Rating: (46) Feedback Score: 46 reviews	Try moving the slider to cold. If it's on cold, the lever could actually be broken off from the adjuster. Happened with my car. edit: Hmm just read that you have an S14, not sure if there is a manual lever for the hot/cool door mixer. If not, the mechanism itself might not be switching. __________________

06-25-2012, 02:12 AM	#4
Butcher240sx Zilvia Member Join Date: Oct 2010 Location: Houston Texas Age: 40 Posts: 157 Trader Rating: (0) Feedback Score: 0 reviews	How long if ever was the system exposed to outside air? Was the drier replaced and suction put on the system when charged? __________________ Don't Mess With Texas

06-25-2012, 12:35 PM	#6
Butcher240sx Zilvia Member Join Date: Oct 2010 Location: Houston Texas Age: 40 Posts: 157 Trader Rating: (0) Feedback Score: 0 reviews	the drier is a cannister conected to your ac lines near the condensor. it removes moisture from the refrigeriant.i replace mine if i open the system at all. open overnight is long enough to ruin it. Mine was $8 new. open it and install it right away and go get a proper ac charge so they can pull vacume on the system. that sounds like your problem. __________________ Don't Mess With Texas

06-25-2012, 01:27 PM	#8
Butcher240sx Zilvia Member Join Date: Oct 2010 Location: Houston Texas Age: 40 Posts: 157 Trader Rating: (0) Feedback Score: 0 reviews	Yes sir. Make sure to get the o rings on straight, on the S13 the pressure switch is attached and I had to move it to the new one. It's a very important part of the system. __________________ Don't Mess With Texas

06-24-2012, 05:54 PM	#3
97SerevoSX Leaky Injector Join Date: Oct 2010 Location: Ky Posts: 89 Trader Rating: (2) Feedback Score: 2 reviews	I think that is electric in the s14 or vacuum controlled. Either way, I hear it switch over and it isn't "heat" coming out of the vents. It's much cooler than that and when I slide it to hot it gets a lot hotter (like my heat does) so I don't think it's that..

06-25-2012, 01:21 PM	#7
97SerevoSX Leaky Injector Join Date: Oct 2010 Location: Ky Posts: 89 Trader Rating: (2) Feedback Score: 2 reviews	Ahh right next to the battery (or where the battery used to be at least)? I will definitely try that. Is that something I can get at autozone?

06-25-2012, 01:42 PM	#9
97SerevoSX Leaky Injector Join Date: Oct 2010 Location: Ky Posts: 89 Trader Rating: (2) Feedback Score: 2 reviews	Hmm what about on an S14. Mine's a 97 with all the original A/C stuff

06-25-2012, 02:29 PM	#10
Butcher240sx Zilvia Member Join Date: Oct 2010 Location: Houston Texas Age: 40 Posts: 157 Trader Rating: (0) Feedback Score: 0 reviews	Not sure, find the drier and if there is a switch and harness on it thas the same. __________________ Don't Mess With Texas

06-25-2012, 02:34 PM	#11
Butcher240sx Zilvia Member Join Date: Oct 2010 Location: Houston Texas Age: 40 Posts: 157 Trader Rating: (0) Feedback Score: 0 reviews	Nissan 240sx A/c Receiver-drier at Auto Parts Warehouse This is the drier. Mine has 4ports and an inspection eye on the top. One port for press. switch, one line in, one line out, and one plugged. __________________ Don't Mess With Texas

06-26-2012, 12:31 PM	#12
ka4life87 Leaky Injector Join Date: Jun 2012 Location: casa grande Posts: 104 Trader Rating: (0) Feedback Score: 0 reviews	Did u draw a vaccum on ac system prior to filling freon? Will never get cold if air in system

06-26-2012, 02:38 PM	#13
Butcher240sx Zilvia Member Join Date: Oct 2010 Location: Houston Texas Age: 40 Posts: 157 Trader Rating: (0) Feedback Score: 0 reviews	It will get a little cold, but suction will assure a full fill and a drier will remove all the moisture making the system much more efficient. __________________ Don't Mess With Texas

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