Automotive Air Conditioning Information Forum (Archives)

yearlingsun on Sat August 15, 2015 5:46 PM

Year: 1987
Make: Nissan
Model: Maxima
Engine Size: V6 3.0
Refrigerant Type: R134a
Country of Origin: Japan

Hello all,

I have a 1987 Nissan Maxima that the AC doesn't work right on. When I turn the car on the AC will work and blow cold for about a minute but then it starts blowing hot. I've noticed that when it stops blowing cold and starts blowing hot the radiator fans cut off, when the radiator fans cut off so does the AC compressor. The compressor was replaced not too long ago because the old one was locked up. Today I replaced the pressure switch that goes into the drier thinking that was the problem. It still does the same thing and I'm not sure what I need to look at next as the potential culprit. I know the drier should be replaced since I've worked on the system and compromised the drier. Is it possible my problems are being caused by the drier? I don't know if any work has ever been done on this vehicles AC system so the drier in it could very well be the original.

Any advice is appreciated!

Edited: Sat August 15, 2015 at 9:26 PM by yearlingsun

Cussboy on Sun August 16, 2015 9:42 AM

I think the place to start is to read both high and low pressures at 1500 rpm before the AC cuts out.

I think possibly a sensor is turning off the fans, which in turn shuts off the AC compressor, so that's a great clue.