89 240sx AC problems

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BrianZ32
Posts: 85
Joined: Tue Sep 13, 2016 1:55 am
Car: 93' 9 2+2 300zx

89 240sx AC problems

Postby BrianZ32 » Sun Aug 26, 2018 9:55 pm

I made a mistake and now my AC doesnt work.

When i bought the car, the prev owner told me the AC needed a recharge but never told me if it was R12 or R134. Once i found out it was R134 but with the old fitting. I filled it, but i believe there is a leak somewhere. I checked the level a couple weeks later and it needed to be topped off. To fill it, i needed an adapter, so i when i topped it off the 2nd time, my dumb*ss left the adapter on and its leaked out. And now my AC doesnt turn on, nor does the green light on my climate control. I heard it is some sort of safety switch. Since then, i have added some, but it is difficult to get an accurate reading as the AC needs to be on to properly fill it up. Any recommendations? I have not checked any fuses yet because i wasnt too sure where to go about it.


MikeRL411
Posts: 216
Joined: Sat Nov 29, 2014 7:46 pm
Car: 1997J30T, 1967RL411

Re: 89 240sx AC problems

Postby MikeRL411 » Sun Aug 26, 2018 10:44 pm

THe 89 and 90 use the oldeR and now Aobusly epensive R12 FREON, not he current R134 1 SO, YOU HAVE RELOADED THEWRONG REFIRIERANT 14!

BrianZ32
Posts: 85
Joined: Tue Sep 13, 2016 1:55 am
Car: 93' 9 2+2 300zx

Re: 89 240sx AC problems

Postby BrianZ32 » Sun Aug 26, 2018 11:32 pm

MikeRL411 wrote:
Sun Aug 26, 2018 10:44 pm
THe 89 and 90 use the oldeR and now Aobusly epensive R12 FREON, not he current R134 1 SO, YOU HAVE RELOADED THEWRONG REFIRIERANT 14!
Sorry, i failed to mention that it was convert to R134a but the R12 fitting was still there

amc49
Posts: 1009
Joined: Mon Jun 19, 2017 7:24 pm
Car: '11 Versa
'17 Altima

Re: 89 240sx AC problems

Postby amc49 » Mon Aug 27, 2018 3:51 pm

Did the oil type change too? I ask because the usual mineral oil used with R12 is incompatible with R134.

The compressor will stay off until you get past the pressure in the system that re-enables it to come on, usually around 25 psi or so. You just charge with system not working until it comes on. Of course, if it leaks faster than you can put it in the system will never come on.


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