I have a 1991 Nissan 300ZX with the following problem. The A/C /Heater will not stay on.


Asked by Apr 27, 2013 at 08:26 PM about the Nissan 300ZX

Question type: Maintenance & Repair

The A/c will come on and then go off. The view on the pod will jitter on and off. we have pulled the pod off and attaced another pod and it still does the same thing. It seems that this starts when the car has been driven for a short while. The fuses have been checked and they are OK.
Has anyone out there had this problem?

6 Answers


I haven't had this problem. If I do experience this condition, I would take it to a repair shop and have them vacuum the air out, check for leaks and refill with new Freon. It sounds like you might have low fluid in the system.

1 out of 1 people think this is helpful.
James Ramond

the pod, assume sight glass on water filter. low Freon causes bubbles going around


How is low fluid going to cause a flutter of the electrical connections on the a/c heater small screen which shows what temp you have set the a/c for inside the car?

1 out of 1 people think this is helpful.
James Ramond

its not, thought you were looking at another area, the screen no doubt has a control unit somewhere that does it all! including compressor activation .a ZX forum would be the place to pinpoint location of device! Z cars are complex with electronic circuts

1 out of 1 people think this is helpful.

Hello IRVDANIEL, I also have a 1991 30ZX and I am experiencing the same intermittent problem. Originally thought it was a low battery (12.03 volts) because radio was also acting up, but not the case now with new battery. The symptom is that the electrical power goes "out" to the AC display control panel, making the screen go blank, but also all of the ac controls. Did you ever figure out the problem? chris4sail


I have a 91 300tt. It also has a compressor that is pulsing on and off. The system has been flushed and recharged, I checked the ac air amplifier and all the sensors. It still pulses. I have an aem stand alone fuel management system and we have checked that also.

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