a/c help

[JAKracing]

FYI: 92 240sx fastback/ stock KA24DE
since i got the car the a/c hasn't worked. so today i figured i would try to recharge it. i went and got a retro fit kit. as soon as i hooked up the gauge, it was in the red warning area. so i let out the pressure and recharged it.

it would only recharge a little at the time. so i put two cans in it and still no cold are. the a/c button light is on, the car idles up when i cut the a/c on, but still no cold are. prolly something else that is more expensive.

could someone please shed some light on this subject. i searched and can't really find nothing, so i come up here hoping to find answers......

thanks in advance,
jason

[The Chad]

When you charged the A/C did you have your engine running and the A/C on full Blast? I didn't read the directions the 1st time i charged my A/C and tried it with the engine off. The gauge read the High pressure (as it wasn't circulating). WOrks fine now :) If that doesn't work you have to start replacing parts/looking for leaks.

[JAKracing]

yeah i had the car running and all.....if it had a leak would it still hold pressure?

[Sileighty_85]

expansion valve is probably stuck open

happened to mine

[The Chad]

yup +1 for expansion valve. Located behind the glove box in the breather case. you need to undo the 2 a/c lines on the firewall side 1st and the box comes out. The Valve wrapped in some gummy tape stuff. I just did mine too in my Nissan 240. My Volvo 240 only needed a recharge :).

[JAKracing]

alright so what do i have to do to it

[The Chad]

Replace it. It's like $35? I think. Then PM me for a step by step. I just did mine 3 days ago so it's still fresh in my mind.
*****You will have to purge your system before you undo the lines and completely refill it with R134 after*****

I did my A/C Dryer while I had my lines off. Another Cheap part. The dryer is super easy to replace though.

[zr0]

i just bought a fixer up 90 240 and the charge is in the green.. but the light isnt coming on over the AC panel. ideas?

[The Chad]

check wiring all the way back behind the button. And check the compressor to be working and wiring.

[zr0]

yeah i just pulled the panel out and everything is connected.. the compressor isn't coming on when i have someone push the ac button.. nor is the light.. yet the recirculation light does work

[The Chad]

hmmmm. might just be a coincidence. May be a bad bulb in the button and a bad compressor or wiring into the compressor. Check the connector that goes into the compressor with a volt meter with the button pressed and with it off.

[The Chad]

Or shit you're only like 6 hrs away. Just give me your car and I'll give you and electric scooter? lol :)

[zr0]

lol yeah not to far. might be cooler riding on a scooter ha.

[The Chad]

Haha.
A/C coming along OK? Any Progress?

[zr0]

i haven't done much this week.. going to go buy a OHM meter so i can see if i'm getting any power to the compressor

[The Chad]

good idea. it's a good tool to have.

[dennydizzo]

hey dont the 89-93 240sx come stock with r12 refrigerant unless it was retrofitted and conveted to r134??

[The Chad]

I believe so...My 91 Volvo 240 had to be retro-fitted for the r134. Some small shops still have R12 though, gotta know someone though :).