For a home air conditioning unit 35 psig low and 125 - 150 psig high (depending on outdoor temp) are desirable.
If the pressures are always equal running, the compressor is bad and would need replaced
R134a goes into the low pressure port
All r134a low pressure (suction) connections are the same size. All high pressure connections are the same size. The low and high connections do not interchange.
In the low-pressure side of the system, R134a is a gas with low temperature and pressure, typically around 30 psi. In the high-pressure side, R134a is a high-temperature, high-pressure gas, usually around 250-350 psi. These two systems work together to transfer heat from the inside of the vehicle to the outside, providing cooling.
20-30 on low side and 160-220 on high side depending on outside air temp.
It is totally normal for blood pressure readings to fluctuate throughout the day, even in healthy individuals. If readings are consistently high or low then the best advice would be to consult a doctor.
ambient temperature X 2 + 50= good high pressure reading low should be between 30-40 for good reading may vary depending on ambient temperature
Both low pressure systems and high pressure systems are large-scale atmospheric circulations associated with air movement. They both influence local weather conditions and are characterized by their respective pressure readings (below average for low pressure systems and above average for high pressure systems).
It is in the last place you would think. P.s. Its in plane sight R12 Low Side 7/16 in. threaded ß----------à R134 Low Side 13mm Quick-disconnect R12 High Side 3/8 in. threaded ß----------à R134A High Side 16mm Quick-disconnect On older R12 systems, the LOW and HIGH pressure service fittings are screw-type Schrader valves. On newer R134a systems, the LOW and HIGH side service fittings are quick-connect style fittings. The LOW pressure fitting is SMALLER than the HIGH pressure fitting.
You can typically find historical high and low atmospheric pressure data for specific locations by consulting weather websites, apps, or meteorological services that provide past weather information. Additionally, some weather stations or devices may have the capability to display past high and low pressure readings.
To add R134a to a 2002 Saturn SL, first ensure the engine is off and the AC is set to the maximum cool setting. Locate the low-pressure service port, which is typically near the AC compressor; it has a larger diameter than the high-pressure port. Attach the R134a refrigerant can to the low-pressure port, following the manufacturer's instructions, and open the can while the engine is running and the AC is on to allow the refrigerant to flow into the system. Monitor the pressure and avoid overfilling, as this can damage the AC system.
There will be two. Generally the low pressure is mounted more towards the front of the car and will most likely have a blue cap on it. If it does not have a blue cap on it compare it with the high pressure port. The high pressure port (for r134a) will be wider with different threads where as the low pressure port will be slim. If you cannot find either search deeper with a flash light. Be careful to wait till the car has cooled, although you should not have to search too much as the low pressure port is generally easy to reach. Also, check the label on your car to make sure it is r134a coolant. If it says r12 you will need to take it in to have it charged with r12.