A/c help please!!!

[Jleyva]

I have a 1998 dodge ram 1500 5.9 the ac blows hot I've replaced the ac compressor the evaporator and the ecumulator I even did a ac vaccum on the lines their are no leaks but I can't figure out what the problem can be please help !!!

[harleyguy]

Is the compressor kicking on and is the engine cooling fan turning on?

When you changed things did you add the right amount of freon and oil?

[Jleyva]

Yes the AC compressor enguages and the fan turns on to but still blows hot air

[Jleyva]

Yes the right amount of freon was add and oil to

[harleyguy]

Have you put a gauge on it what pressures do you have?
When it's running does the low side pipe get cool at all?

[Jleyva]

Yes when I add freon the pipe or line does get cold but but dosent blow cold air through the vents and the guage pressure goes all the way to the red side.

[harleyguy]

Sounds like a blockage somewhere. Did you change the orifice tube when you changed everything else?

[Jleyva]

When I added the freon I noticed their wasent an orifice tube in their. But I thought the orifice tube wouldn't really do much if I add one and add freon again thinking I might get the same results

[harleyguy]

You should have an orifice tube or expansion valve. Something has to be there to regulate flow. Did you flush the system and blow air through it?

[Jleyva]

Okaybi will fint one and no I did a vacuum on the lines inatead. Do you think it will help to do a flush

[harleyguy]

It wouldn't hurt I always do when replacing a compressor. Just so you know you don't get chunks of old compressor in the system.

[Jleyva]

Even though my evaporator is brand new and my AC compressor is new should I still do a flush

[MikeCStig]

Originally Posted by Jleyva

Even though my evaporator is brand new and my AC compressor is new should I still do a flush

It sounds like you didn't replace all of the lines. You don't have to, but if you don't, yes the system should be flushed. You may discover that some kind of blockage in the lines is the source of your problems.

[Jleyva]

Okay thank you guys for the feedback I will flush out the system and hopefully it start blowing ice cold again

[the61]

My vent door was not opening I got it open and put a screw to hold it till I get time to chase down the problem.
If one pipe is cold and one hot it's flowing. Check the vent door.