The system pressure for the air conditioning unit in a 2002 Dodge 1500 Van with a 318 motor should typically be around 30-40 psi on the low side and 200-250 psi on the high side when the system is operating properly. These values can vary slightly based on ambient temperature and other conditions. It's important to refer to the vehicle's service manual for specific guidelines and to ensure the system is adequately charged with refrigerant.
Never. A properly operating AC unit will have no leaks, thus never need recharging.
The low pressure air conditioner port can be found on the top of the air conditioner compressor. The low pressure port should be labeled as such.
The pressure for an R410a air conditioner system should be 118psi LP and 412psi HP. This is the same pressure as an R22 air conditioner.
70-85/ 350/290
That depends on a number of things including: how hot is it outside, inside, is it functioning properly, is it sized properly?
On the energy guide label of an air conditioner, you should look for the energy efficiency rating, the estimated yearly operating cost, and the cooling capacity of the unit.
The suction pressure in a R22 system should typically range between 60-70 psi when the system is operating under normal conditions. It is important to consult the manufacturer's guidelines and consider other factors such as ambient temperature to ensure the system is functioning properly.
Recharging should be on low-pressure side only
upgrade
Evaporator temp should be 15 Degrees. Gauge pressure should be around 15psig
Depends on power factor, but it should be about 8 Amps.
Clean install.