Automotive Air Conditioning Information Forum

I've only had this vehicle just over a week now and yesterday checked for the first time.....

Yep...REAR AC. Found lots of Oil at the expansion valve so this changes everything. Now I'm going to remove the rear evaporator to check for leaks and most likely replace the rear expansion valve and ...

JohnHere wrote: Wed Aug 19, 2026 9:00 am Note: This topic is four years old.

All I saw was AUG 18...and thought it was yesterday. oops

Contrary to the Factory Service Manual, elevated pressure on the high side usually indicates a condensing issue. At a 96°F ambient temperature, the high side should be ~225 PSI with decent condensing.

Do you happen to know whether the condenser and fan(s) have ever been replaced?


Hello ...

Hello!
I'm working on a 2001 Dodge Grand Caravan I have owned for about a week now. I am not getting cold air at the vents.
When I first checked the system it was low on refrigerant but still had some pressure and about 15oz of refrigerant so I assume it wasn't exposed to atmosphere AFAIK.

(I ...

Diametric,
We're just funning and staying friendly,hope there is no offense.
It was just a thought for reward for service to this free web site (services performed:
"ACKITS.COM" grill ornament for TIM
"BRADFORD HERRICK" emblem for bohica's Salt Flats cycle
Hotrodac


......a few decades later ...

Here is a list of reasons for a high side to be too high, from one of the masters (Ice-n-tropics):

Blocked circuit inside evaporator coil


I've never seen this? Is this a common occurrence?


Evaporator coil with internal by-pass due to faulty manufacture or over pressurization during service ...

Hello everyone,

I just wanted to post a follow up to my 1993 Jeep Cherokee XJ A/C repairs. (original post here: https://autoacforum.com/viewtopic.php?p=25581#p25581). I had some service valves leaking oil at the compressor, so I needed to open up the system. I recovered the refrigerant from the ...

Thanks.

If you have enough residual flushing agents to ruin your vacuum pump oil, your concern should be the oil in the AC system and a better flushing technique to remove it before the vacuum stage of the repair.


It's not really a question of how much flushing agent remains in the lines or if that is ...

Hello,

If I use denatured Alcohol to flush my vehicles automotive AC system wil the alcohol necessarily dilute / contaminate the Vacuum Pump Oil so that it needs changing?

Thanks