Garage Cabinets, Garage Storage, and Garage Organization

one more thing...

Yesterday, I looked at the compressor and realized the clutch was engaged, but the air was warm....my question is, if the compressor is engaged, is it a must that cold air should be coming out of the vents?

 or is there another valve, that should allow the circulation of the gas thru the system?

I know there are many sensors that turn the compressor on and off, many sensors that help the aux fan regulate speed, etc, but for instance, could it be that the evaporator valve although there is pressure from the compressor does not allow it to flow?....

I may be looking the wrong direction....

ok, Bad news, I replaced the n22 with my brothers unit, and my a/c system still does not work, I however took advantage of my brother and sent him my old unit, just to see how mine works on his car.  Also,I'll post the error codes I got with my brothers N22...

good luck and hope this will lead us to the solution we all wanted.


_________________
W I N D Z
Once is enough, twice is too much, thrice is a disaster...

windz:

FROM ABOVE...

[Yesterday, I looked at the compressor and realized the clutch was engaged, but the air was warm....my question is, if the compressor is engaged, is it a must that cold air should be coming out of the vents?

 or is there another valve, that should allow the circulation of the gas thru the system?]

could You answer this?...

mechefan wrote:

windz:

FROM ABOVE...

[Yesterday, I looked at the compressor and realized the clutch was engaged, but the air was warm....my question is, if the compressor is engaged, is it a must that cold air should be coming out of the vents?

 or is there another valve, that should allow the circulation of the gas thru the system?]

could You answer this?...

once the compressor is engaged cool air is produced. it is the expansion valve that is responsible for spraying the cooled, liquid refrigerant into the evaporator. this evaporation process absorbs heat from the fresh air flowing through the system of tubes and honeycombs, cooling the air.

the expansion valve is also one of the things that we should look out for. i have experienced this one too before but the symptom is that the air conditioning doesn't get's cool at all.


_________________
W I N D Z
Once is enough, twice is too much, thrice is a disaster...

ok, we are in the right track I think, even though the guys that charged my system claimed the put the right amount of freon, I have my doubts, from this I get the following question...

If I had too much freon, could it be that the compressor is pumping but the expansion valve can not recirculate the freon?
If so, this could reflect on the compressor and pressure sensor? (the actual errors that keep showing)

So what is the ideal pressure on both sides of the hi and low pressure lines when the ac is working?...I have the gauges, and I'll check again..

Now, believe it or not, I feel cold air coming out for 1 second or 2 when I start the vehicle, as long as I have the a/c on before I shut the engine off previously.

How can I check for a bad expansion valve?..

mechefan wrote:

If I had too much freon, could it be that the compressor is pumping but the expansion valve can not recirculate the freon?
If so, this could reflect on the compressor and pressure sensor? (the actual errors that keep showing)

yes, it can or there is too much moisture on the system that the expansion valve clogs.


_________________
W I N D Z
Once is enough, twice is too much, thrice is a disaster...

mechefan wrote:

So what is the ideal pressure on both sides of the hi and low pressure lines when the ac is working?...I have the gauges, and I'll check again..

low pressure pipe= 2-3 bars]
high pressure pipe= 16-20 bars


_________________
W I N D Z
Once is enough, twice is too much, thrice is a disaster...

mechefan wrote:

How can I check for a bad expansion valve?..

you can only check the expansion valve if it's leaking and it is not repairable. reasons why the element of the expansion valve damaged is due to moisture and dirt on the refrigerant circuit.


_________________
W I N D Z
Once is enough, twice is too much, thrice is a disaster...

Have You noticed that on all of my readings the evaporator temperature is always higher than the heater temperature?  I read at some other page that that this should not happened, now, if it is higher, than means that either there is no freon circulating, or that my heater core sensor is bad???? what Do You think?....

also You mentioned a range of 16-20 bars on the high side, if I get 15.1 or less according to my readings, can that be it?....

ok, I'm going bananas here.....

question....is the refrigerant pressure on the n22  #7 , the same as the high side of the line?

I f so, I'm not getting much, I'm getting between  8 and 15.1  when the a/c is running and less than 6 when the a/c is off.

I have some issues connecting the high pressure gauge, so I was able to connect only the low pressure side, it stays between 20 and 40PSI(1.38-2.76 BAR), up and down, but with a pattern. So I will assume is charging and discharging ok, but i'll connect my high line tomorrow and see what I get on that side.

Ok, I found out that my brother's N22 (my old one) is working fine.....what is the next step.....

it will be the Expansion valve If the high pressure value is normal, too high at low pressure value can be caused only by a defective expansion valve. The valve obviously injects too much refrigerant.


_________________
W I N D Z
Once is enough, twice is too much, thrice is a disaster...

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Six-cylinder in-line engine with four valve technology
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Max torque (Nm/rpm) 315/2750

Success!!!!   Got it working!!!!...Thank You all!!!

It was the expansion valve!!!.........when I took the pipe/hose off the expansion valve, I noticed a lot of the green dye that helps to find leaks, and I had to purge the system with compressed air, disconnecting the evaporator on both sides. then the condenser on both sides.  It seems that everytime I put freeon the can I picked, contained either some dye or some sealer......SO BE AWARE!!!.

What I did was basically to clean the system, and add only the correct oil and refrigerant without any other substance mixed with it.....

Thank You guys for all the help, remember, if the clutch engages,and its not cooling,  is either not compressing, or you have a blockage somewhere, (the expansion valve in my case)....Thanks again!!!