Low pressure too high in ac

There are two ports in the air conditioning system of Equinox. One is labelled H for high-pressure and the other one is labelled L for low-pressure. You can recharge your AC through the low-pressure port with a do it yourself AC recharge kit.Shake the canister briefly and release the refrigerant into the system until the recommended pressure has been achieved. Note: See next section for recommended pressure values

High and low side will be different sizes

Pressure has built up in the system possibly from a clogged orifice tube/expansion valve. Replace the orifice tube/expansion valve, thenPull a vacuum on the system and recharge.

the correct one should be smaller, and your recharge hose should be only able to connect to it. the smaller fitting is the low side, and the larger fitting is the high side. recharge only to the low side. the high side is used by technicians with elaborate ac manifold guages to monitor success. these guage kits can be bought at harbor freight for about 55 dollars,and give a better recharge,as you can regulate pressure as not to overfill, which lessens the cooling

> I was going to add some more freon and the gauge that came with the can does not fit the valve. There are normally two valves on the AC lines; one is the low-pressure valve (inlet to the compressor), the other is a high pressure line leaving the compressor and going into the exchanger. The low pressure valve is the point at which Freon is added and pressure is measured with a single valve. The high pressure valve is customarily used only by service personal to determine compressor performance and should never be used to recharge the system; they are intentionally different to avoid rupturing the the Freon container. Trace all of the lines to be sure if you have found the right one to use for recharging and measuring the 'low' pressure side.

recharge your AC system

You didnt actually post a question so I will try to help. You need 134a refrigerant and a way to get it into the system. Places like walmart and Advance Auto Parts has what you need. Most diy kits have a hose to connect to the Low Pressure side of the ac system and a guage. The other end of the guage has a connector that fits on the can of 134a. Start the car, turn the ac on high, open the hood. Being careful of moving parts under the hood, connect the hose to the Low Pressure side of the ac and see where the guage is reading. Most are color coded. If it says it needs charged, squeeze the trigger until the can is empty and take another reading. Continue until the guage is in normal range.

The frosting of the line is normal. Did you use a gauge set when charging the unit? AND, most important, Did you evacuate the system before putting in the freon? Very important.What was your final low side reading and your final high side reading?

there are 2 ports one for low pressure and one for high pressure. the low pressure is bigger in diameter and is usually close to the dryer and or fender and firewall. the high pressure is near the condensor on the fron of the vehicle. if there are caps for the ports low will be blue and high will be red. low side pressure should be 35-50 psi and high pressure should be 135-150 psi

There are two A/C refrigerant lines. The small line is your high pressure line and the larger line is your low pressure line.
Start at the fire wall and follow the "large " low pressure line to the compressor. The low pressure charge port will be some where on that line.
DO NOT try to recharge on the high pressure side ( small line )
Good luck, let me know.
Regards,