on air conditioners you silver braze the copper lines
my copper lines freezing on central air unit.
copper pipe
There are two ports to recharge the air conditioner in a 1998 VW Jetta. Follow the Air Conditioner lines to the firewall, the lower one is on the passenger side near the strut tower.
Water.
actually there are many:solder wicksolder suckersoldering iron and lead bending toolhot air reflow (one of best, can remove devices with hundreds of pins easily)hot barpropane torch and vice-grip pliersetc.
If you are talking about the larger of the 2 copper lines, the problem could be that the unit is low on refrigerant. Check to ensure that the large line is insulated and not exposed.
You need a vacuum pump designed for that purpose.
Turning an air conditioner on its side can cause the compressor oil to flow into the refrigerant lines, potentially damaging the unit and affecting its performance. It is recommended to keep the air conditioner upright to prevent any issues.
Have the A/C lines checked for leaks.
60 to 70 psi depends up on copper pipe length
There`s a hole somewhere, if not the lines then it`s in the equipment.
You need to either get more air across the coil, or the AC is overcharged. A blocked air filter can reduce air flow and result in freezing refrigerant lines. As can an underspeed AC blower motor or a dirty blower cage.