Why is Nissan AC so whimpy

[jpsc]

My 240SX AC is always so whimpy - always has Freon R-12 and always never cold enough. Is there any mods to improve the AC output?

[InsanityInc]

there's probably something wrong with part of your AC system. Mine works fine.

[xekushnr]

i may be completely wrong, but i believe r134a is just a much better refrigerant. plus with the cost of r12 today, you'd be saving money with a conversion kit as well.

[TheOne]

mine cools up pretty fast, and quite cold for bein a 93 model.

[ArticDragon192]

Mine cools up pretty well.

[bcar240]

Mine is strange, the air coming out feels like ice, but the car never really seems to get very cold on warm days. I don't use it much anyway, so no biggie. Is the air being pushed out fairly hard?

[navysnail]

r-134a tends to work less efficently in systems designed for r-12. i would suggest freeze 12 or envirosafe as an alternative to r-134a

[jpsc]

I look at the ingredient for Freeze-12 - gee, that thing has 70-75% R-134a and 15% of R22 or R123 one of those to help move the mineral oil.

Well, if I were to put a thermometer on my vent, it does feel cold, but not cold enough to lower the inside temp down

Is there an electrical fan especially for the AC condensor?

[KADreams]

Is there an electrical fan especially for the AC condensor?

Yes, it is hidden under the factory fan shroud. It turns on when the AC is on, and for extra cooling when the engine reaches a certain temperature.

[bruinbear714]

i may be completely wrong, but i believe r134a is just a much better refrigerant. plus with the cost of r12 today, you'd be saving money with a conversion kit as well.

On the contrary, r12 gives a much colder AC than r134a but is damaging to the environment. And r12 is illegal, unless you get it on the blackmarket.

[navysnail]

acually, r12 is illegal to manufacture, not sell. companies stockpiled it before it was banned, and that is all that remains, which is why it is so expensive.

envirosafe is a nother choice, it is a hydrocarbon that is environmentaly friendly, it doesnt have a chlorine in its molecular structure.

http://www.es-refrigerants.com...t.asp

read through the FAQ, has some good info.

[Chingon]

psh, cross the border, 8 bux later you have a can of r12.

[HashiriyaS14]

My '98 S14's AC is almost too cold, I'm always alternating between the "1" (lowest) fan setting) and "off", because "1" is too cold....

I only use the higher settings when I'm cooling it off after it's been sitting in the sun for awhile.

[Pencil Shavings]

My '98 S14's AC is almost too cold, I'm always alternating between the "1" (lowest) fan setting) and "off", because "1" is too cold....

I only use the higher settings when I'm cooling it off after it's been sitting in the sun for awhile.

lol, you could leave it on "1" and just turn the temperature up a bit..

[Neejay]

Ive just started dealing with this.

My uncle was gonna charge my AC for $20, but when he went to charge it, of course there was a loud "hisssssssssssssssss". I have a leak/hole somewhere in my lines and I cant pinpoint it exactly.

[travisn]

make sure you have the recirculate button pressed. that way it sucks cool dry air from inside the car, instead of hot humid air from inside, it makes the system work less to do the same thing... ie it works better and faster

[9240sx]

Ford's A/C are always the best Not sure way.

[travisn]

you probably have a slow leak (or someone may have let some out) so there will be lower pressures which will lower the efficiency of the system,

and if its too cold (HashiriyaS14) you may have too much refrigerant which will cause too high pressures (but not high enough to set off the high pressure switch that will turn off the compressor clutch) and with high pressures the evaporator will run really close to 32 degrees which will make for really cold temps. so go to an ac shop and tell them to take some refrigerant (they should say ok bc they will get your r134a for free) like a tenth or two of a pound and see if it makes your ac a little more bearable on the higher speeds. thats if you dont want to slide the temperature control to a little warmer selection... my 93 240 can get duct temps like 35 degrees after i converted it to R134a the other week...

[Fenvy]

we the AC that pushes us against our chairs

[JDMEnthused]

mine works actually really good.. i barely use it though. it sucks that most cars just come with A/C Compressors big enough just to cool most of the car down and thats it, no more..

[kouki munster]

Ford's A/C are always the best Not sure way.

I second that, the A/C in my truck will have me shivering after about 5 min in the summer. Now, if I could just get the heat to work that good.

[ricebike]

mine works actually really good.. i barely use it though. it sucks that most cars just come with A/C Compressors big enough just to cool most of the car down and thats it, no more..

just keep it "maintained" by running it ~10 minutes each month to move the lubrication around... i've recharged my r-12 system back in tech school in 1997 & never had to touch it to thi day

[JDMEnthused]

thanks for the heads up.. i just cant wait to get rid of my KA :-p

[Chezedik]

1) 134a is a MUCH WORSE refrig, not even as efficient, just better for the atmosphere. 2) try adding a fan to your condensor, it is like adding squirters to your intercooler, in that it is more efficient. Now, there probably is something wrong. If you are not able to service it, pay someone. It takes a lot to service an A/C correctly, and you can't do it right and legally underneath a shade tree.

[Kenrik]

I just replaced almost my whole AC system. Compressor/belt/drier/seals/expansion valve.

I filled it with R134A and it cools down to 50 Degrees.. (yes 50!) there is something wrong with your system. you might try having it flushed and refilled (should cost less then $100)

BTW it cost me $400 total to redo the whole system
Modified by Kenrik at 3:16 PM 11/26/2005

[Kenrik]

Ive just started dealing with this.

My uncle was gonna charge my AC for $20, but when he went to charge it, of course there was a loud "hisssssssssssssssss". I have a leak/hole somewhere in my lines and I cant pinpoint it exactly.

They sell special AC Charge that has a green neon color (like alien blood) when you look at it with special glasses that way you can easily find any and all leaks!