A/C pressure testing issue - AC Auto Repair Help Forum


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A/C pressure testing issue

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Auto Repair Home>> Automotive Repair>> AC Auto Repair Help Forum

Kuroyabumozu
New User

Apr 23, 2023, 7:34 PM

Post #1 of 3 (1200 views)

A/C pressure testing issue	Sign In

I replaced A/C compressor, I vacuumed up the A/C system, I refilled the A/C system with R-134A refrigerant. It blew cold air for about 3 mins then stopped, so then the next day I was trying to check the A/C pressure because the 2nd day there’s no cool air coming out of the fan, but somehow the A/C compressor clutch was still engaged when just turned on the car, that indicates there’s refrigerant in the system, but shuts off and on in the interval of 3 mins. Also while the car is off, I tried to check the pressure…. Somehow I can't for the High-Pressure side, it would just splash the refrigerant out, and the Low-Pressure side was able to hook up, but no reading at all.
Could someone please explain what’s wrong with my A/C system?

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(This post was edited by Sidom on Apr 23, 2023, 9:23 PM)

Sidom
Veteran / Moderator
Sidom profile image

Apr 23, 2023, 9:24 PM

Post #2 of 3 (1159 views)

Re: A/C pressure testing issue	Sign In

What is the year make a model of the vehicle working on?
How much refrigerant did you charge the system with?
What type of AC equipment are you using?

Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Apr 24, 2023, 12:31 AM

Post #3 of 3 (1149 views)

Re: A/C pressure testing issue	Sign In

Exactly - please state the vehicle. Many don't use a high side port and you can't just use pressures systems know it, dash warnings or not is not more than it's in trouble if present.

Just FYI temps known = pressure known for sensors the port is really just another place to leak,

T

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