A/C cooling issues

[JoeBoxer1130]

2003 Chevrolet Tahoe,
Does anyone know if the AC lines are supposed to be like this? I tried to photoshop the picture of my situation. BLUE arrows are COLD to the touch, and the RED arrows are HOT.
I'd like to know if this affects the temperature inside while the AC is working. I wanna assume the freon isn't empty because its blowing cool air but not COLD enough.
Any tips or help will be greatly appreciated.

 

[justirv]

2003 Chevrolet Tahoe,
Does anyone know if the AC lines are supposed to be like this? I tried to photoshop the picture of my situation. BLUE arrows are COLD to the touch, and the RED arrows are HOT.
I'd like to know if this affects the temperature inside while the AC is working. I wanna assume the freon isn't empty because its blowing cool air but not COLD enough.
Any tips or help will be greatly appreciated.

So the temps are in the right location. Gauges are best in determining charge. Where that green line is defines where the orifice sits. High pressure liquid (red) enters the orifice and flashes to a gas in the blue line, which is your cooling effect. The blue line goes into your interior hvac system which contains the evaporator. This is like a radiator that removes heat from the interior (cooling the air that passes over). That cold line should feel like a cold beer, about 38°- 43°. Check your cabin filter behind the glove box, if it is clogged you get no air flow, then make sure your blend doors are working properly. The blower motor has multiple speeds, if it's stuck on low you could have a bad resistor.

 

[LsHart]

There should be endentions on one of those lines. There is a filter in it. Replace with the same color. The shredder valves, both high and low leak over time. U can burp air out of the low side when truck is off. If fluid comes out then no more air is present. Top off with freon. Do not use stop leak!!!

 

[TJ Baker]

U can burp air

In a properly serviced AC system there is NO AIR in there at all. None.

 

[nonickatall]

Most common issue you is, you have not enough freon in your system. If the pressure drops, the spread between hot and cold reduces, that leads into insufficient cooling power. If pressure drops to low, A pressure switch detects this and shuts off the air conditioning.

 

[TJ Baker]

Most common issue you is, you have not enough freon in your system

If there is not enough refrigerant in the system then there is a leak that should be located and repaired.

Refrigerant is not something that gets used up and needs to be replaced occasionally. If that were true then everyone would have to have their home refrigerators refrigerant topped off occasionally.

 

[nonickatall]

If there is not enough refrigerant in the system then there is a leak that should be located and repaired.

Refrigerant is not something that gets used up and needs to be replaced occasionally. If that were true then everyone would have to have their home refrigerators refrigerant topped off occasionally.

That is not correct. Freon diffuses through seals and pipes. An air conditioner isn't filled indefinitely; after a few years, enough refrigerant is lost and the unit stops working. If the unit is in good condition, this can last 10 to 15 years, but it can also happen after just one year.

You can't compare an air conditioner to a refrigerator, even though the basic principle is the same. A refrigerator is well-protected in a kitchen, not exposed to water, wind, or road debris, and is designed without large screw connections, because refrigerators aren't built around hot engines and driven at 100 km/h.

A refrigerator uses metal pipes; the generation of heat and the transfer of cold are located close together, allowing the entire system to be built compactly. This is completely different in cars, where hoses are used to compensate for vibrations and movements, and the cooling takes place at the front radiator, but the cold is needed in the interior.

This is roughly equivalent to comparing the computer of the Voyager probe, which has been traveling through space since the 1970s, to a cell phone that I use daily, which gets dropped, submerged in water, left on a patio table in direct sunlight, and so on.

I do AC service I know what I'm talking about...