AC problem 10 minutes for the air to start getting cold ?

2009 LEXUS RX 350
204,000 MILES • 3.5L • AUTOMATIC
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BEETLEPUNK21
Hello, I am having an issue with my air conditioner. It literally takes about 10 minutes for the air to start getting cold when it is coming out of the vents. I did hook up a gauge to it because I thought that maybe it was low on refrigerant, but the gauge read Like it had enough pressure and freon.
Jun 28, 2026 at 12:54 AM
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STRAILER
  • ✓ASE Certified Mechanic
  • 54,515 POSTS
  • ASE Certified Mechanic
Yep, it sounds like the compressor is going bad or you have a stuck expansion valve, but we need to know the high side pressure as well, please go over this video:

https://www.youtube.com/watch?v=4EqdrBVb0sY

Here is a gauge set for $43.00

https://amzn.to/4v67Auu

Can you tell me if the radiator fan comes on when the engine is running and the A/C is on? Please go over this video and get back to me so I can help you fix it.
Jun 28, 2026 at 5:02 PM
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