Which AC line is the low pressure line?
The low side, or suction line, will be the line connected to the compressor from the top or higher position. It will be cold to the touch and may be wrapped with insulation. This is where freon enters the compressor as a gas.
Do you add freon on the low side?
The freon is added on the LOW PRESSURE SIDE ONLY. The hose tool you bought is made so you can only hook to the low side as the high side and low side fittings are different sizes and shapes for SAFETY’S SAKE.
Why is my low side AC pressure high?
If The Low Side Pressure Is High And The High Side Pressure Is Low… It could also be related to the AC pressure switch, the expansion valve, the evaporator, or the dryer. There could also be a leak in the AC system. The AC pressure switch regulates the flow of refrigerant through the compressor.
What does it mean when your air conditioner is low on refrigerant?
Well, something similar to that happens in your air conditioner is low on refrigerant. Low refrigerant means low pressure and low pressure means low temperatures that will eventually freeze something called an evaporator coil.
How can I Check my AC low side pressure?
Just follow the user instructions of the pressure gauge to read your AC’s high side and low side pressure. The correct pressure readings depend on what car you have, and you can find the correct numbers out from your car manual. Here’s a simple guide that you can use to compare your readings with:
What should the refrigerant level be when the engine is off?
When the engine is off, the readings shouldn’t be close to 0 or over 150 psi. Low readings mean that there is almost no refrigerant, which may be caused by leakage, while high readings suggest that the system is overcharged.
Why does my refrigerant line have ice on it?
When the evaporator coil freezes, cold liquid refrigerant flows through the refrigerant line, causing the surrounding moisture in the air to freeze. So that’s why the refrigerant line has ice on it. Again, this sign could be caused by other issues.