A/C problems

[Mikel]

Hello,
My A/C has began to act funny. On a hot day, specially at low speeds or after a lot of idling, it will go very quickly from working fine to blowing warmish air. The electric fan does work.

What puzzles me is that I can idle at a stop for 20 minutes on a hot day, with no problems, and shortly after I start moving, the A/C will all of the sudden start blowing warmer air. I would expect the problems to happen when there is no airflow other than the fan's. Any ideas?

Thanks

Mikel

(95 XJ, 4.0)

[Runnin'OnEmpty]

Mike, it's probably just low on refrigerant. There should be a sight glass directly behind and below the compressor. With the engine idleing, have a helper turn the A/C on max (from off), and watch the sight glass. You should see a rush of bubbles, and then the glass should clear. If bubbles continue to appear, then the refrigerant is low, and should be re-charged.

[Mikel]

Hello,
This is what I see: When the A/C compressor cycles, I see fluid through the glass. When the compressor stops, the level drops and I see bubbles. This happens at every cycle.
Thanks,
Mikel

[langer1]

If it's throwing hot are why is the compressor cycling.

The only time you might see bubbles is when the compressor starts, it sounds low you should not see bubbles.

[Seamoose]

I just had mine drained and re-filled. had been blowing warmer air.. not really enough to cool down.. also I could hear the a/c compressor cylcing on/off quite a bit..


work great after a new boost..