R134a goes into the low pressure port
The high pressure (discharge) side starts at the compressor outlet and ends at the metering device inlet. This side will have the smaller refrigerant lines. The low pressure (vacuum) side begins at the metering device outlet and ends at the compressor inlet. This side will have the larger refrigerant lines.
low side port is located on most cars at the accumulator at the fire wall (most cars not all) the low side is the bigger of the 2 lines the high side is the smaller one. if the car takes 134 freon then you can buy a fill kit to add freon to the car and the hose will only fit the low side.
There is ice on the dehumidifier coil because it is low on freon. When there is not enough freon in a refrigeration system the inlet pressure to the compressor is lower than design due to lack of gas. Because it is at a low pressure the freon is very cold. This causes freeze-up. If You were to add freon to the running dehumidifier you would see the cold coil thaw, first at the end closest to the compressor suction and then work toward the other end of the coil. When the thaw reaches the other end of the cold coil it has enough freon and no more need be added. Tim Koller
what are the similarities between high and low pressure
sounds like there is no orifice tube in it. orifice tube should be located just before it enters the firewall at end of high pressure line
I too own a 2002 sport trac. My son used a store gauge that has a high and lower pressure gauge. The blue gauge is for the low side and the red is for the high side. Your low pressure line for the ac is near the firewall and high pressure is near the compressor near the front of the truck. On the guage system you have a red, blue and yellow line. Yellow line is in the middle. You hook up the red to the high side, blue to the low side and then use the yellow to hook a can of freon onto. Pressure on the low side gauge should not go over 35 psi and the high side should not go over 225 to 250 max. try to stay around 225 psi in the high line. Once hooked up you open the valve on the gauge for the red and then do the blue. Red first then blue. WATCH THE GAUGES TO ENSURE YOU DO NOT OVER FILL OR OVER PRESSURE THE UNIT!!! If it makes any crazy noises turn it off immediately and it it appears to have over filled you will need to take it to get some of the freon removed. My compressor cycles on and off but and if yours does it is probably safe to add freon. If it does not then I would not add anything and just take it somewhere to have it checked out. I know in this day and time we all want to save money but we have to be very careful or we could end up with major medical bills. Frost bite from freon is not fun. Please be careful. Good luck I hope you can get your ac up and running. I am using the cans with the leak stop just incase there is a problem of a leak.
arterial end
On the aluminum end part of the suction side hose, this will be the larger hose.........
low toxicity and low reactivity of freon makes it impossible to make it react with the complex structure of human blood but yet it causes global warming and freon is also used as a cooling system in high end computers
Low pressure cap is usually color coded blue-red is high side.
It is both: Higher pressure incoming and Lower pressure on the extruding end.
The low pressure port on The 88 supra is mounted on the back of the compressor. The system uses r12 Freon.