nissan patrol air conditioner

Submitted: Monday, Nov 02, 2009 at 00:05

Member - Troy and Kate

Has anyone with a nissan patrol gu had any problems with their air conditioner cutting out when towing a van?
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AnswerID: 389652   Submitted: Monday, Nov 02, 2009 at 00:21

Member - Graham H (QLD) replied:

How hot was the day and how hot was the car.

1 HZ Croozers do that if they get too hot at least my mates one does. He was told thats normal.

Cheers
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FollowupID: 657405   Submitted: Monday, Nov 02, 2009 at 00:44

Member - Troy and Kate posted:

Hi Graham,

I have spent around $1100 since i have left Darwin trying to find what the problem is, some say its a heat issue, so i fixed that, but the air con only cuts out when the van is hooked up.
To answer your question the day was just over 40 degs, and the car,s temp sat on about 3/4. Travel speed 70 to 80km,s and a tail wind.
Thanks Troy
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AnswerID: 389654   Submitted: Monday, Nov 02, 2009 at 01:22

Member - Graham H (QLD) replied:

A good place to ask is on the Patrol forum


http://www.patrol4x4.com/forum/

Does it cut out as soon as you hook up and connect the power etc to the van or down the road when it gets hot.

Mine never did it but someone here may know.

Cheers




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FollowupID: 657410   Submitted: Monday, Nov 02, 2009 at 01:59

Member - Troy and Kate posted:

Hi Graham,
It normally happens about 5 or 6 klm down the road,
Thank's for the web address i will have a look at it.
Troy
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AnswerID: 389686   Submitted: Monday, Nov 02, 2009 at 13:44

Member - Troll 81 (QLD) replied:

I am not towing a trailer but this is my story

It has happened in my GU Petrol when I do slow, low range work in very hot conditions outside temp around the 35 degree mark. I have a aftermarket temp monitor running on the top radiator hose and when my water temp reaches around the 110 degrees then the aircon starts blowing out hot air.

I have overcome this problem by installing a switch to turn on my 2 front engine fans when she gets a bit hot, this then forces more air through the aircon condenser.
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FollowupID: 658485   Submitted: Tuesday, Nov 10, 2009 at 01:20

Member - Troy and Kate posted:

G,day Troll 81,
Haave just got back into reception, sorry for the long delay in a responce.
Our air con cuts out once the temp gauge hits half. i spoke to a bloke in Newman who mentioned the second fan up front.
Thanks for your advice.
Troy
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AnswerID: 389690   Submitted: Monday, Nov 02, 2009 at 14:23

Member - Timbo replied:

How hard is your foot on the go pedal?
Some cars are programmed to switch off the a/c compressor when you press hard on the go pedal on the assumption that when you accelerate hard you want all (or most) of the available power from the engine, hence the a/c (which saps power) will be switched off until you back off and resume 'normal' driving again...
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FollowupID: 658486   Submitted: Tuesday, Nov 10, 2009 at 01:25

Member - Troy and Kate posted:

G'day Timbo,
Been out of range, sorry for the late response,
The foot is generally hard to the floor towing the van,
4th gear, about 80 to 90klm and 2200 rpm's.
I didn't know about the pedal switch, i will try it next time the vans hooked on.
Thank's
Troy
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AnswerID: 389692   Submitted: Monday, Nov 02, 2009 at 14:34

Who was that again? (Vic) replied:

Troy and Kate, that is a standard 4.2 Nissan feature. No options. Try dropping a gear to take the strain off the engine to see if that helps.

The other option is to change brands or engines. Roachie spent thousands on trying to improve his radiator to allow the engine to cool, but ultimately bought a changed out engine model. Comp engines have additional cooling paths if they want to maintain reliability. I have seen the pipes coming out of the head.

To save the engine, the system cuts out the airconditioner when the engine gets warm.
Cheers,
Who?
John
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Reply 5 of 10
FollowupID: 657450   Submitted: Monday, Nov 02, 2009 at 14:39

Willem posted:

Not my 4.2!!!!! In fact I am surprised that the aircon still works with all the hard work the bush taxi has done :-) But then again....its a GQ....lol

Cheers
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AnswerID: 389704   Submitted: Monday, Nov 02, 2009 at 15:37

Member -Dodger replied:

I have a 4.2td Patrol and yes this is a safety feature to save the engine from extreme heat. When the temp guage reaches just above the halfway mark somewhere near the 3/4 position the air-con is switched off to reduce heat inflow into the radiator. The only fix I know is the addition of an engine oil cooler which does help.
I my case the air-con stays off until the next down hill run or a long flat then you will feel it operate again.
I also find that when towing in hot temps which is when mine turns off IE ambient temp around 35%c I simply slow down to around 80kph and the beast then seldom turns the air con off.
One can disable this feature by disconnecting a radiator sensor (I cannot recall if it is the left or right sensor on the bottom of the radiator but it is one or the other) however in my case I thought the risk too great as by having the air-con turn off it is an early indication of the engine heating up and one can then monitor it.
Another thing is one should remove the radiator from time to time and clean out any gunk that has accumulated between the air-con condenser and the radiator. This is a relative simple task for the home mechanic.
I used to have a handle on life, but it broke.

Cheers Dodg.
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Reply 6 of 10
FollowupID: 657491   Submitted: Monday, Nov 02, 2009 at 19:30

anglepole posted:

Yes that is how it works.

Turns off the A/C when radiator temperature is too high. Better to turn off the A/C and keep going!

Check out the cooling system. Could be somethong simple like fans not comming on.
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FollowupID: 658488   Submitted: Tuesday, Nov 10, 2009 at 01:35

Member - Troy and Kate posted:

Hi Dodger,
Just back in reception, sorry for the late reply.

Our air con cuts out about 5 k's down the road and the wont come back on until we book into the next caravan park, about 200 to 300 k's down the road (lol).
Have had the radiator flushed twice this year, last time in Broome, about 2 weeks ago.
Had a look at all the sensors and found that the previous owner had bridged one of the sensors. so i cut it to see what would happen. the fan went a bit haywire for a while but no change in the air con's performance, so i hooked it back up.
Thanks for the info.
Troy
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AnswerID: 389707   Submitted: Monday, Nov 02, 2009 at 16:09

Trevor R (QLD) replied:

Hi Troy and Kate,

As mentioned it is a safety cutout sensor in the bottom of the radiator measuring water temp and cutting the a/c when water gets warm in an attempt to curb the increasing water temp. There is a higher temp cutout sensor than the standard one that some of the early GU where issued with. Nissan service or parts dept should be very well aware of the part no. I have this sensor and it does help heaps with longer running a/c but won't stop engine running hot so you will need to keep a close eye on temp gauge in adverse heat conditions.

You are welcome to email me direct or MM as you are a member you can view my email addy in my profile. Many of us 4.2 owners have spent a motza on trying to fix this engine temp issues and have plenty of stories to tell. Don't get started with Roachie as he was the beginning of my empty wallet with all the goodies attached to his rig hehehehe.

Hope this helps,
Trevor.
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FollowupID: 657562   Submitted: Tuesday, Nov 03, 2009 at 11:57

Trevor R (QLD) posted:

I should clarify, I was just kidding with comments about Roachie. He has helped me heaps and given me great answers to many difficult problems I have had and I am sure if you ask he would do similar for you too.

Regards, Trevor.
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FollowupID: 657568   Submitted: Tuesday, Nov 03, 2009 at 13:01

Member - Timbo posted:

Hey Trevor, is this more of a problem with autos than manuals or does it affect both?
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FollowupID: 657579   Submitted: Tuesday, Nov 03, 2009 at 14:21

Trevor R (QLD) posted:

Timbo, my reference is to personal experience surrounding the 4.2 turbo diesel GU's which in Aus were only manual. I am not sure (certainly I am not aware of)if the same problems exist in petrol or 4 banger diesels which had the option of manual and auto. It certainly is very common in the 4.2's though.

Hope this clarifies.
Trevor.
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FollowupID: 657583   Submitted: Tuesday, Nov 03, 2009 at 14:52

Member - Timbo posted:

Thanks Trevor, just wondering because I know that autos often heat up quicker when towing. I was planning to look at the 4.2L TD Patrol (along with a few other vehicles) for my next vehicle. I'm not likely to be towing anything for travelling (as long as I can avoid it) so overheating shouldn't be an issue, right?
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FollowupID: 657585   Submitted: Tuesday, Nov 03, 2009 at 15:01

Trevor R (QLD) posted:

If my vehicle is loaded and I mean LOADED, I can get it to run hot on long hard climbs but nowhere near like when I am towing. I have had one of my 4.2's from brand new and it now has 380+ thousand k's on it so even running them hot doesn't effect long term performance (if you are not stupid of course and actually overheat them good and proper). I most certainly would buy another one again (as I have just 12 months ago) but be understanding of their inherent design.

Cheers, Trevor.
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FollowupID: 658489   Submitted: Tuesday, Nov 10, 2009 at 01:42

Member - Troy and Kate posted:

Hi Trevor,
Sorry for the late reply, have just git back into Port Headland, i will be going to the nissan dealer tomorrow to ask about this part.
Thanks for your help.
Troy
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AnswerID: 389719   Submitted: Monday, Nov 02, 2009 at 17:54

Ozboc replied:

I have not read the other replies -- but mine does this , especially on a very hot day when going up very long hills where i am on the noise peddle for about 5min near the floor and working dam hard..... I believe its a safety feature as your motors cooling is far more important that you getting cool fresh air in your face as the radiator for the aircon is in front of the cars radiator and it will just allow already very heated air through to try to cool your coolant

on those occasions -- open your windows and turn of the A/c

BOC


P.s mine does it when the heat reaches near the H
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Reply 8 of 10
FollowupID: 657501   Submitted: Monday, Nov 02, 2009 at 20:47

Kumunara (NT) posted:

BOC


I had problems with my radiator and put in a new one. Could not get an alloy one. Since then have had problems with air-conditioner when towing or if I travel at highway speeds.

Not having an operating air-conditioner in my vehicle is a problem. You may believe that your motors cooling is far more important than getting cool fresh air in your face. However in my situation not get cool fresh air in my wife's face endangers my life.

I don't want to go to the expense of purchasing another radiator. If you have any ideas let me know. You may save my life.


Tjilpi
Life's great and it just keeps getting better
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FollowupID: 658490   Submitted: Tuesday, Nov 10, 2009 at 01:49

Member - Troy and Kate posted:

G'day BOC

Have had the window down since Darwin and AC in the off postion, i'm still waiting for the cool wind in my face, i think i will have to wait until i get to the southern states again (lol).
Thanks for your help.
Troy
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AnswerID: 389748   Submitted: Monday, Nov 02, 2009 at 20:40

ferris replied:

My 4.2 used to do that all the time, overheating without a lot of encouragement. On days over 40 degrees I had to have the a/c off and heater on full to keep the needle going beyond the H, even on a moderate hill when towing. After spending a heap of time and money with Mr Nissan I installed a PWR radiator and haven't had a moment of trouble since. Even on the hottest of days, towing, the gauge just does not move.
Keep the shiny side up.
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Reply 9 of 10
FollowupID: 658491   Submitted: Tuesday, Nov 10, 2009 at 01:52

Member - Troy and Kate posted:

G'day ferris,

Can you give me anymore info on this PWR radiator.
Thanks ,
Troy
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FollowupID: 658627   Submitted: Tuesday, Nov 10, 2009 at 22:05

ferris posted:

Troy,

Here is the link to their web site. http://www.pwr.com.au/#/view=home/http://www.pwr.com.au/#/view=home/

They are based out of the Gold Coast and l found them to be most helpful, but very expensive. Expensive enough to be individually listed on my insurance policy.

The radiator provides about 50% more cooling l believe, and as l said in the original post I've not had a moments trouble since. Before going down this path l explored larger thermo fans etc..., gave all that a way as a learning experience. To me the quality is long remembered after the price was forgotten.

We had quite a few teething problems, and the radiator had to be freighted back a couple of times to be modified to fit properly, and l had to modify the inter cooler mounts to get the radiator in. PWR were very helpful, and although they didn't say so at the time, l suspect l was one of their first customers with this model radiator.

There are other brands on the market, some of which are cheaper. I haven't seen the others but l was most impressed with PWR's build quality.

If you do order one of these radiators, be careful as Mr Nissan most considerately put a couple of different types of radiators in their 4.2 Patrols. Get a spec sheet from PWR and carefully compare their specs with your radiator.

Good Luck/

Ferris




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AnswerID: 389888   Submitted: Tuesday, Nov 03, 2009 at 22:16

replied:

owned a 99 4.2 td. Had same problem driving in extreme heat not towing. Nissan service agent showed me the plug to disconnect (wouldnt do it him self) so it would not turn off in this situation. Cant remember where it was. somewhere near radiator I think .Obviously not standard practise for nissan but it did the trick and never did any damage. The air con would turn off when temp got a needle over half.
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