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Where do you add refrigerant in a 2006 peterbilt 379?

Updated: 8/21/2019
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6y ago

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The low side schrader valve. Exact location can vary, but if you go to the passenger side, follow the refrigerant lines from the firewall, you should find it. It'll be the one with the blue cap, if it still has that. Otherwise, it's the smaller of the two schrader valves.

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6y ago
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6y ago

Low side schrader valve... follow the refrigerant lines. On either the large line or on the receiver-drier, the port will be there.

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