Hi,
Does your AC blow cold air when the vehicle is moving? If yes, then the fan should be looked at.
If no, then it's not the fan, but most likely not enough charge in the system.

What is the pressure, I assume you have a gauge on the low side, when the system is running?

 

Oops, double post.

 

Hello GC,

No the air coming out of the vent is warm / fresh but not cold.

I dont remember the pressure value I will have to look at it tonight
Yes I was connected to the low side, suction pipe is not getting very cold.

If I was missing gas should the pressure not getting high?
Inside fan works fine, I was referring to the radiator / condenser fan (share the same) should it be on as soon as I activate the A/C button?

Alos, what do you mean by :
Does your AC blow cold air when the vehicle is moving? If yes, then the fan should be looked at.??

If no, then it's not the fan, but most likely not enough charge in the system.

 

I'm not 100% sure if the radiator fan will come on right away when AC is activated or not. In theory It doesn't have to if the system is controlled by internal pressure and line temperature.

What I meant by my comment is that the condenser has to have air moving across it in order for the AC to blow cold air. If the radiator fan is not working properly, you will notice the AC getting warmer as you come to a stop, but once you start moving it will get cold again.

If this is what you are experiencing, the the radiator fan is probably the culprit.

However, if the air coming out of the vents is always warm regardless if you're moving or not, then the radiator fan is not an issue.

 

I will check that but I notice that air a little colder when I'm on the highway but not cold for sure

Do you know if there is a way to 'force' the radiator fan to start without playing in the control/fuse box

 

You should be able to disconnect it and apply 12v to it to see if it works. Another way would be to check with the volt meter if you are getting 12v at the wiring harness connector when the AC is on.

But if your not getting cold air while moving, then I suspect you need to add refrigerant to the system first. Then worry about the radiator fan.

 

ok thanks will check that out and let you know, thanks for the advice!!

 

Hello GC

I've check the low side pressure, it is rising slowly, initialy +/- 25-30 psi than goes up to 50 psi.
Refrigerant is R134a

 

What was the outside temperature when you took the readings? Also, how long did you let the system run? Did the radiator fan kick on at any time? It should be run on max. cold and the heater fan on medium speed for about 10 minutes or so to let the system stabilize.


Here is a reference chart for the pressures vs outside air temperature.

 

I would say around 75-80F ambiant
Yes motor and A/C was on for on for more than 15 minutes
Coldest settings but blower was at max speed

No the radiator fan never start and pressure seam to go higher like 60 psi so I stop the A/C

 

Ok, the radiator fan should have definitely started during that time. I thought that you started the system to quickly check the pressures and then shut it off. But since that's not the case and your pressure is rising as time goes on, which is normal since there is not airflow across the condenser, the radiator fan should be looked at.
I would first check if it's getting 12V and go from there.

 

thanks I will

 

Hello GC,

Last night I use wires and the battery to supply 12 volts to the radiator fan motor
(I had a 12vdc power supply but probably not strong enough the fan barely move so I used the van battery )

It made a spark, probably touch the wires together .. oups … but after that the fan start to turn?!? too funny
Now the fan start as soon as the engine is on or not long after
Air is a lot colder not cold cold but better.

One thing I'm trying to find is the electrical diagram to see what make it start beside fan relay and fan resistor

Do you know where I can find it, can't see in my Haynes book.


One thing I notice is the air coming out of the passenger vents is warmer than the diver vents, I already check the actuator that drive the doors and they were 'turning' so I wonder why one side would be warmer if they share the same evaporator



Thanks again for your big help!!! really appreciate
Thierry

 

You're welcome.

Sorry, I don't have any wiring diagrams.

I have a feeling that the contacts may have been corroded slightly and when you disconnected them to do the test, they got cleaned and started working again. If you have some dielectric grease I suggest applying a bit to the contacts.

Now that the radiator fan is working, you should do another AC pressure test to see what it reads now.


I think the passenger side blowing warm air is a sign of bad blend door actuator. Do you have a multi zone climate control?

 

thanks

Where you going to add something you end with ' I'll' ?

 

It was the autocorrect on my phone LOL.