no need to change the copper tube if the capacity of the unit is same.
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.
No set answer to that, as steel pipes come in various diameters and wall thicknesses. If you want to be real accurate, they also come in various steel alloys, which do have some difference in density between them.
There is no real set temp for the lines ,the bigger thing is the heat that the outside unit is producing when the unit is on. A normal functional AC unit will be around 105 to 110 degrees as for the copper lines they should feel pretty cold to the touch like an ice colds beer feels in your hand......
no
suction line liquid line
An ac unit that has copper pipes can freeze up just as other pipes can freeze up. Once the unit freezes, you need to turn them off.
yes if the unit is not baked
unscrew it replace it, copper pipe coil easy to replace. Two pipe nuts about 3/8"
If your present central A/C is not that old consider just replacing the outside condenser unit, check into that first before considering replacing the entire central A/C system.
The evap coil can be changed. However, depending on what kind of A/C unit you are talking about, it might make more sense to replace the whole unit. Also, before you invest in the time it takes to do the work of replacing the coil, make sure the rest of the unit is in good condition.
Depending on the vehicle, if they are also replacing the fuel pump/sending unit, that price is not out of line. But just replacing the tank alone, it is a little high, again depending on the vehicle.
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.
Replace just the mirror unit (complete with cover). They are sold on ebay for between $15 - 25 per unit. You don't have to replace the entire visor.
Replacing the Electronic Sending Unit on a 1991 Chrysler LeBaron is something that needs to be done by a professional. It\'s not something that should be taken lightly as a misplaced unit can make the whole car run badly.
Replacing the gauge could be a costly job but it is seldom the gauge goes bad. More likely the temp gauge sending unit is at fault. Replacing the temp gauge sending unit would take less than 15 minutes.
Yes new units are much more efficient.
There is no such unit of measurement as the "pipe".