Why is liquid line not warm?

the liquid line is high pressure not high heat. the whole point of the condenser is to take the very hot high pressure gas that comes out of the compressor and cool it down to a warm not-as-high pressure liquid as it exits the condenser. my liquid lines are typically only slightly warmer than ambient.

Why does my GMC Sierra AC blow cold and then warm?

Basically, AC is cold for first 30 minutes of day, and then turns warm. I use to could turn the compressor off using the switch on the dash, wait a few minutes, then turn back on and it would cool down for 5 to 7 minutes then turn warm again. A never ending manual cycle through the day!

What should the high side pressure be on a GMC Sierra?

Your low side pressure should be 30-35 PSI and your high side pressure should be 200 PSI. The orifice tube regulates the flow of Freon into the evaporator and the accumulator is not only your filter but also removes moisture that when reaches freezing can block the flow if the moisture is not absorbed by the accumulator.

What should the pressure be on my Silverado?

If you get a pressure gauge by Duracool from Wal-Mart you can check if pressure is somewhere between 25-38p.s.i is perfect, and no more than 45 p.s.i. I beleive the gauge may need a can screwed on to block off your aéc refrigerant from leaking out.

Why is my AC not working on my Silverado?

It is possible your AC system may have a slow leak, or even be overcharged. The AC system will not operate if it senses pressures too low or high. If you get a pressure gauge by Duracool from Wal-Mart you can check if pressure is somewhere between 25-38p.s.i is perfect, and no more than 45 p.s.i.

What should the PSI be on a Chevy Silverado?

Surprised it kicked on at all. for chevy/gm trucks after 1987 psi recommendations as follows. With an ambient temperature of 70f your low side port psi should be between 32-38 psi. And for every 5degreeincrease in ambient temp your psi readings will increase by 5psi. For optimal cooling it is recommended to use the lower psi.

What does low side Reading on Silverado Sierra mean?

Low side readings are suction when the compressor is running – so 75 was dropping to 20, the low side limit switch stopped the compressor, and it when back to 75 – approximately static pressure in an a/c system. goes into the system. hope this helps a few – pm me if you have questions.