High and low side pressure will tend to equalize with unit off after 5 minutes or so. All that says is that your system is not completely open to atmosphere. You need to check low side with compressor running. It should be in the 25-35psi range for cooling to occur.
Sounds like:
1 moisture/air in system. Google: Dry-Pak and Cryo-Silane. Have your tech purchase both and install them. You need an EPA 609 cert. to buy yourself.
moisture is deadly to any ac system.
2 leak in system - google: cliplight to seal it.
Same problem occured in my car too. I took to mechanic twice. Both had opinion with problem in controller. As per them the compressor clutch does not activate and ultimately cooling is not possible. May be this is common problem in Lexus vehicle.
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in 90 - 00 Lexus LS400
Posted
Same problem occured in my car too. I took to mechanic twice. Both had opinion with problem in controller. As per them the compressor clutch does not activate and ultimately cooling is not possible. May be this is common problem in Lexus vehicle.
Somebody can help us to solve it.