PimpCode323

i would part in the sun and my car would get hot then i turn my AC on and ofcourse its gonna blow hot air but after driveing and 1 hour still hot air blowin but if its cold out and turn the AC on it blows cold air how can i fix this

Slitfang

iTrader: (1)

well it could mean one of several things:
Your temp sensors could be broken.
If it doesnt blow cold air you could need a freon recharge.

PimpCode323

ok can u tell me how to check if i need to do these or how the objects look and is it easy to do or would i go to like a AutoZone and they can do it

PimpCode323

when i turn on off the Ac it makes this hiss sound

maxbimmer

My '97 does the same thing, hot air when hot outside, cold air when cooler outside. And it's full of freon. Compressor and fans come on when A/C is activated. Big pipe from compressor going into firewall is usually cold and sometimes warm, small pipe coming from firewall is cool sometimes. Anyone have any ideas?

Slitfang

iTrader: (1)

my advice is to take it in. yea, it could be expensive, but at least your A/C and heating is fixed.i do think its the sensors tho.

matty

iTrader: (54)

What sensors ?

Rob20

i dont remember what its called but i think its like a fluid or something the ac uses and on my sentra it went out and wouldnt give cold air..took it to nissan and fixed it...was like $250

ChrisMan287

iTrader: (34)

I think its the temp sensor, but I'm not sure.

njmaxseltd

iTrader: (19)

Most likely the charge is incorrect.
Have the system evacuated and recharged correctly.

maxbimmer

On mine, I thought it was low on freon cuz it would cool sometimes, brought it in to get it checked, it had more then what it should've had, so it was evac'd and had the proper amount put in.

angellasta

I have a 03 maxima gle, and my a/c blows out cold air in the begining then it stars blowing out hot air. I proceed to turn it off for a minute, then I turn it back on and it gets cold.After awhile the temperature gauge starts rising to hot, where i proceed to turn the a/c unit off until it goes back down. I have changed my thermostat, and added freon to it..and i am still having this problem..it blows cold, then hot..sometimes it takes about 4 or five times of me cutting it off and on to get it to run cold and then all of a sudden my temperature gauge goes up as if my car is running hot.

Amerikaner83

iTrader: (17)

You have a 5th gen, this is the 4th gen forum.

Go to the proper forum and ask there, the answers will help you better than here.

BUT since you are here, you probably didn't bleed the cooling system properly. Search for the proper way to bleed the cooling system and try again.