An air conditioner in your Pathfinder that blows cool air makes traveling during the hot summer months bearable. If the air is warm instead of cool, recharging the system may help. In models made after 1995, you may be able to simply add R134 refrigerant.
Models made before this must be retrofitted to accept R134 refrigerant instead of R12. Inspect the lines for signs of extreme wear or damage. There are leak detection kits available at most auto parts stores that will help you to see leaks and possibly seal small leaks.
If you notice any damage or leaks, you need to fix them before you try to recharge the system. Find the Low Pressure Side port of the air conditioner. On most Pathfinder SUVs, this will be located near the front grill on the driver side of the engine.
In some cases, you may find it near the firewall. This depends on the engine size and year model. The cap on the LPS port is blue and marked L or LOW.
Look at the connector valve to determine if the system is R134 or ... more.
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