Freightliner Century 112/120 AC Driers-Compressors

Frequently Asked Questions About Freightliner Century 112/120 AC Driers-Compressors

What does the AC drier (receiver drier) actually do on my Freightliner Century?

The AC drier, also called a receiver drier, filters moisture and debris out of the air conditioning refrigerant while also acting as a storage reservoir for liquid refrigerant. Keeping this component in good condition helps protect the rest of the AC system, including the compressor, from contamination and moisture damage that can lead to poor cooling performance or premature failure.

How do I know if my compressor or drier needs to be replaced?

Common signs include weak or inconsistent airflow from the vents, unusual noises coming from the compressor, visible oil residue around fittings indicating a refrigerant leak, or the AC system cycling on and off more frequently than normal. If your system has been opened for repair or has sat empty for an extended period, the drier should typically be replaced as a preventive measure since it cannot be cleaned or reused effectively.

Will these parts fit both the Century 112 and 120 models?

Products listed in this category are cataloged specifically for Freightliner Century 112 and 120 models, but AC system components can vary by production year, engine option, and cab configuration. We recommend confirming your VIN or existing part number against the listing details before ordering to ensure proper fit.

Do I need to have the AC system evacuated before installing a new drier or compressor?

Yes. Any time you replace an AC drier or compressor, the system must be properly evacuated and recovered by a qualified technician using approved equipment. Opening the AC system without recovering the refrigerant first is not only unsafe but is also regulated under EPA guidelines, so this job is best handled by someone with the proper certification and tools.

Are these replacement parts new, remanufactured, or used?

Availability varies by listing, and each product page will specify whether the part is new, remanufactured, or a tested used component. Be sure to check the individual product description and any included warranty information so you know exactly what condition the part is in before you buy.