Problem with Air Conditioner on Nissan Gu Patrol 2001Turbo 4.2lt Diesel

[Ennoiv]

Hi
Can anyone help with the problem i am having with my patrol air conditioner. The compressor and clutch has been checked and the Thermo fan is working but the air con goes on and off when driving any distance towing my caravan. When not towing the van it seems to work ok. Has anyone else had this problem with their nissan. If so what was it and how much did it cost to fix. The next step is to have the thermostat and button on the dash looked at. Cheers

[BigRAWesty]

So is it the compressor switching on and off? Or the fans.
Either way I think it's normal for both to switch on and off, but only when towing?? Maybe it's the thermostat opening and closing which is setting off the thermo's


Kallen Westbrook
Owner of
Westy's Accessories

[jack]

Hi Enniov,

Someone will be online soon who may be able to assist. I see this is your second request on this topic within a couple of hours. Just be patient as you'll find most of the people are probably still at work and won't check the forum till later today.
Great forum, great info. Participate and enjoy.

Cheers

[Yendor]

If you mean the A/C temperature goes hot and cold when towing then.

There is a temperature switch in the A/C circuit that will turn off the A/C if the engine temperature gets too high.

I would start by checking there is nothing caught in front of the condenser or between the condenser and radiator.

If this is ok, I would then remove the radiator and send it out to a radiator shop and get it flow tested and clean.

I would also replace the thermostat.

[janderson]

Mine goes hot after about 30 to 40 minutes. I then have to turn if off for 10 minutes and then it’s cold for the next 30 to 40 minutes

[nissannewby]

Sounds like its freezing up. You could have a small leak somewhere and are now low on gas which will give you these symptons. Also Im not sure if the patrol ac systems have them but it would hurt to check your lo and hi pressure switches.

[janderson]

Been doing it right from the day I got the vehicle. The car yard had put in another compressor, and had it re-gassed. When it works it can go down to 2 to 3 deg C. Have tried turning the temp control up so that it sits on about 8 deg C, but still goes hot after 30 to 40 minutes. How do I check the lo and hi pressure switches. Temp taken from centre face air outlet.

[Yendor]

Been doing it right from the day I got the vehicle. The car yard had put in another compressor, and had it re-gassed. When it works it can go down to 2 to 3 deg C. Have tried turning the temp control up so that it sits on about 8 deg C, but still goes hot after 30 to 40 minutes. How do I check the lo and hi pressure switches. Temp taken from centre face air outlet.

When it starts to get hot does the airflow coming out of the vents seem to be reduced? also have a look at the clutch on front of the A/C compressor is it still engaged and spinning with the pulley?

What model and engine is yours?

[janderson]

yes the airflow coming out of the vents dose seem to be reduced. Its a 2002 Gu. Was a 3Lt, now a TD4.2T. Conversion done by Southern
4x4, who I purchased it from.

[nissannewby]

Been doing it right from the day I got the vehicle. The car yard had put in another compressor, and had it re-gassed. When it works it can go down to 2 to 3 deg C. Have tried turning the temp control up so that it sits on about 8 deg C, but still goes hot after 30 to 40 minutes. How do I check the lo and hi pressure switches. Temp taken from centre face air outlet.

The ones I have tested there is a spec in ohms for the switches. It helps to have pressure gauges as well while your doing this. If your pressures are good then your ohms reading should be in spec if the ohms reading is OL then the pressure switch is faulty. It does sound like its low on gas causing the system to freeze up and stop work then once it thaws out ( the 10 minutes you turn it) its all good to go again.

It is a possibility that if the system has been opened and your receiver/dryer has not been replaced then it could be causing issues. But I would be throwing so gauges on it first.