2009 DAF XF 105.460 Air Conditioning Hissing Noise: Clutch Pop, Expansion Valve, Dryer Replacement

Hello. I have a problem with air conditioning in 2009 dafie. The problem is that when the air conditioning comes in, you can hear a quiet hissing from the cockpit. This happens when I hear the clutch pop. Over time, the hissing intensifies with longer and longer hissing and air conditioning together with the hissing intensification - it cools down worse ... The expansion valve was replaced several times (or somehow, I am not a specialist), the air conditioning dryer and the system tightness was checked. Mechanics spread their hands and air conditioning lasts for 2 weeks ... Help ...

Hello, if the climate is enough for 2 weeks and there is no factor, there must be some leakproofness connected to the machine, allow the preparation which stains blue if you can see the tightness under the hood under the cockpit not noticeable. Regards

The system is sealed and the reagent is always on. A soft hissing noise is heard in the cabin. It's like this gas goes "overflow" ...

mlodyprezes wrote:

The system is tight and the factor is still there.

Rather, you have the wrong amount of this factor 134a not enough, this system is pulsating, i.e. the compressor turns on cyclically

I thought so too. It's 700g of what I remember. The machine had this model in mind. It is with this cyclical switching on that hissing appears ... As if the system was studded and the valve could not maintain the upper pressure. The valve was changed 3 times ...

I also think that too few passenger cars that do not have 900 g the valve suffered damage or was just replaced because so claimed moss.

daf 105 is to have 700g

Added after 1 [minutes]:

123nowy wrote:

daf 105 is to have 700g

. and what is enough for 2 weeks?

Some air conditioners have a filterek on the ducts can cause poor flow of refrigerant, increase in pressure but also weakening of cooling in the cabin.

Hello, maybe so young man, there is a speculum there. the so-called. Saigon, and in it you can see if the system is not completed, I do not remember how much it enters, but the cabin is a plate about the amount of refrigerant. and it will be known if it is ok. you know I will get such a car on days and write how much it should be there, but I have the impression that there is 850gr. it is from the memory of last year. eventually I will look in the DTRs.

Ps. and pro wishes behave like that refrigeration systems in which there is a selection of this medium. here are only a few hundred gr. How about installation where it sits, a few tens of a few hundred, a kilo.

There was no need to move the valve, it was enough to sense the leak, seal, and whether the oil emigrated from the compressor. and then filling procedures.

The dehumidifier is incorrectly mounted or faulty (it happened to me in 105 ce) the radiator will be replaced.
For a 950gr refrigerant system.