xpro

Hello

I need to recharge my AC and I want to make sure that this is the low pressure port. Can someone please confirm?

Clutchless

The black caps are marked H for high and L for low. I think they may have different sized threads to reduce the chance of a mistake. I have not charged A/C in a long time so maybe someone else can assist. Or try YouTube.

Culi

I think you can see the black cap with H on it right below it in the picture.

salimshah

imho ... you will be spending about $30 as a DIY attempt. The same service with diagnosis [assuming there is no additional issue] will cost you about $120 at an auto AC shop. The additional $90 is well worth the risk of doing damage in three figures. This is what I would do, but it is your vehicle and your money/saving.

Salim

rmr714

Hello, I’m having the same issue and have the same question. I can’t find clarification anywhere. Did you figure out if that is the correct port to recharge the ac?
Thanks!

carguy75

The low pressure port and high pressure port are different sizes so the A/C recharge kit fitting will only fit the low pressure port. I never needed to refill my RX350 A/C so I can not verify if the port in the picture without the cap is the low pressure port, but the A/C recharge kit fitting will only fit on the one port which seems to be the one without the cap.

Note: Replace that cap to prevent the refrigerant from leaking out in the future. The cap has an o-ring to prevent the refrigerant that gets past the shrader valves from leaking out of the A/C system.