vehicle a/c issue

[fz1boxer]

needs some input on why an a/c would not take freon on the high side.system had zero freon.freon went in on low side.could the line getting plugged or expansion valve?
would there be somewhere it has a blockage?
i know nothing about how the system works
thanks

 

[whitmo]

I believe you only put it in on the low side. You might want to watch or read a few tutorials online before attempting anything else.

 

[BillsCamino]

Charge the system from the low side

 

[benjamin]

can not charge on high side, might even blow up tank and cause injury.

 

[Rambler]

If the system is empty and under a vacuum, you can charge through the high side fitting. If the system is not under a vacuum and you are adding freon, you add it through the low side fitting. If the system is running and you try to add freon to the high side fitting, you run the risk of blowing up the freon can and doing some major damage. High side pressure can run as high as 300psi, freon containers are not rated for that kind of pressure. I would suggest you find a qualified person to work on your AC system before you hurt or kill yourself.

 

[CTS Tactical]

needs some input on why an a/c would not take freon on the high side.system had zero freon.freon went in on low side.could the line getting plugged or expansion valve?
would there be somewhere it has a blockage?
i know nothing about how the system works
thanks

With it running, the low side is otherwise known as the suction side. The high side is high pressure line. If you hook a hose on the high side, it is going to be under pressure so it is actually going to take freon out of the system and put it back in the tank. If it is the small 1lb cans, they are not designed to hold that much pressure. I hope that makes sense for you. You always put freon in on the low side with it running. You can put it on either side if as stated before the system has been evacuated and in in a vacuum.

 

[fz1boxer]

yes the system was under vacuum and zero freon.
the unit being used to charge the system was a professional use charging station.
he kept saying the line was blocked thats why he went to the low side.
no i wasn't doing this myself with one of those do it yourself canisters.

 

[fz1boxer]

my biggest question is can a blockage develop and where would the most likely place be to look?

 

[CTS Tactical]

After you charged it on the low side did the system cool? If so then I wouldn't expect a blockage. Could have been a bad schrader valve in the high side not letting freon in.

 

[harrycalahan]

Sounds like the schrader is not being depressed. If it is, then you do have a blockage.