AC does not turn on right away when I turn it on

2002 NISSAN FRONTIER
185,000 MILES • 6 CYL • 2WD • AUTOMATIC
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BER04145
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  • 1 POST
How to replace the A/C pressure (transducer) switch on the drier? do I need to remove the Freon?
Sep 7, 2017 at 1:13 PM
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STEVE W.
  • ASE Certified Mechanic
  • 15,200 POSTS
  • ASE Certified Mechanic
That sounds more like you have a system that is a bit low on charge and as the engine heat gets to the R134A and makes it expand and increase the system pressure it starts working. It turns on at between 28-31 psi. Does the compressor cycle a lot as it works?

Anyway if you wish to replace the switch, yes you need to recover the current charge, replace the switch, draw a vacuum and recharge.
Sep 8, 2017 at 1:00 AM
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