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Nissan 300ZX Climate Control Problems

14 messages,  Last post on Aug 16, 2010 at 7:38 PM

You are in the Nissan 300ZX Forum.

What is this discussion about? Nissan 300ZX, Coupe

Messages Page 2 of 2

#5 of 14 Air conditioning by rdobbs

Mar 17, 2008 (9:07 am)

I have an 85 300ZX that has good freon and cannot get cool air into the car. I always have HOT air 150-160 0C, from the defroster outlets. The conrtols have no effect. It seems to be a faulty vacuum problem but I cannot find any vacuum hoses off. The speed control went haywire at about the same time. Anybody had this problem to help me with this?

#6 of 14 Re: Loss of power to the A/C [wildman91] by wildman91

May 04, 2008 (7:32 pm)

Replying to: wildman91 (Jul 24, 2006 8:28 pm)
Its one of the relays behind the fuse box inside the car. The fuse box is located underneath the driver side down to the left of the clutch. To be able to get to the relay you will have to be able to remove the whole fuse box. You will be able to see the relay on the back of the fuse box. How I found the bad reIay I removed one of the relays under the hood that runs the headlights which was already working and enterchanged it with another relay behind the fuse box inside the car until I found the one that went bad. There is more than just one relay behind the fuse box, but just one is bad. We got the relay at Auto Zone. It was around $12.00. Hope that helps!

#7 of 14 a/c head unit by jcuellar

Sep 22, 2008 (1:32 pm)

use to work or that is come could see temp and adjust if needed but then went off cant seem to figure wat it may be........ relay ? is it common?

#8 of 14 87 turbo ac trouble by mpksr

Sep 22, 2008 (7:22 pm)

i have a reading of what looks like -56 on the ambient temp display compressor will not turn on......any info is appreciated thanks

#9 of 14 Re: electrical power outage [hacker4] by joani1

Oct 13, 2008 (8:32 am)

Replying to: hacker4 (Nov 20, 2007 10:02 am)
Try replacing the power supply located under the dash on the drivers side.

#10 of 14 Climate control Failure by techman4

Jan 31, 2009 (11:19 am)

My 91 nissan 300zx climate control system unit flashes on and off and I hear a clicking sound from a relay under the steering wheel. All functions- heat and cool and econ- shut cycle on and off with the flashing of the unit. Where should I start?

#11 of 14 Re: Climate control Failure [techman4] by stivovits

May 22, 2009 (8:27 pm)

Replying to: techman4 (Jan 31, 2009 11:19 am)
Did you ever get this fixed. I have an 86 300ZX with the digital dash that has the same problem, again. About 8 months ago after my regular mechanic gave up the dealer replaced a pre-amp board and it worked until last Monday. I took it back to the dealer and even though the symptoms were the same the said it was the climate control main board, which they could no longer get from Nissan. Also when it does not click I get 100% AC and when I remove the fuse, it gives me heat, nothing in between.

#12 of 14 Re: Air conditioning [rdobbs] by pauld5

May 26, 2009 (2:50 pm)

Replying to: rdobbs (Mar 17, 2008 9:07 am)
Posted to what seems to be (maybe) some of the problem that might be occurring. There is an exchange valve (best I know what to call it, it replaces the heater core thermostat that american cars have. It is located on my 1986 Nissan 300 ZX nontur/automatic, cal emmision, looking into the engine comp. the left hand side, there is a sieries of 3/4" hoses and a sensor like cylinder conected to the vacuum canister valve accuator with or without two wire connected too the sensor. The reason I wrote without is that this sensor (from what cars I have seen are missing the wires and there is a connector to it ussually empty) is a heat sensor, for when the car water temp is warm the valve is turned open, and when cool and if the AC is on the vavle should be in the closed position. Car auto idle up switch works fine, turn AC on RPM increases from 6 to 10 RPM, but hot air is all I get. Any suggestions before outside servicing, or can I replace freon myself?

#13 of 14 Climate Control blower problem by patrick86300zx

Aug 09, 2009 (10:57 pm)

86 300zx non turbo, the blower blows (Climate Control) but only half as hard as it was. It blows on low and high (half strength). It blows full blast when you push the manual defrost (override) button. HELP

#14 of 14 HELP Loose vacuum hose behind glove box by rkbatt

Aug 16, 2010 (7:38 pm)

I have a 1986 300zx and found an unattached 1/8" vacuum hose behind the glove box. The hose comes out of a T where the other 2 hoses go into a brass colored cylinder (servo?). Where should this hose be attached?
 
Thanks,
 
Kyle

Messages Page 2 of 2

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