Mack CV/GU Truck AC Driers & Compressors

Frequently Asked Questions About Mack CV/GU Truck AC Driers & Compressors

What do the AC drier and compressor actually do in my Mack CV/GU?

The AC compressor pressurizes and circulates refrigerant through the system, while the AC drier (also called a receiver drier) removes moisture and contaminants from the refrigerant before it reaches the expansion valve. Together they keep your cab cooling system running efficiently and help protect other AC components from damage caused by moisture or debris in the line.

How do I know if my compressor or drier is failing?

Common warning signs include weak or warm airflow from the vents, unusual clicking or grinding noises when the AC is engaged, visible refrigerant oil leaks around fittings, or the compressor clutch cycling on and off rapidly. A failing drier often shows up as inconsistent cooling or frost buildup on the drier canister itself. If you notice any of these symptoms, its best to have the system inspected before the issue spreads to other components.

Will these parts fit my specific Mack CV or GU model year?

Mack CV and GU trucks were built across multiple model years with some variation in AC system components, so its important to check the fitment details listed on each product page against your trucks VIN or existing part number before ordering. If youre unsure, our team can help confirm compatibility so you get the correct compressor or drier for your specific truck.

Should I replace the drier when I replace the compressor?

Yes, this is standard practice in the industry. When a compressor fails, metal debris and contaminants can circulate through the AC system, and the drier is designed to catch that debris and moisture. Reusing an old drier after a compressor replacement can shorten the life of your new compressor and reduce cooling performance, so replacing both together is generally recommended.

Do these parts come with a warranty, and are they new or remanufactured?

Product listings specify whether an item is new or remanufactured, along with any applicable warranty coverage, so be sure to check the details on each individual product page. If you have questions about a specific part number or need help choosing between new and remanufactured options, reach out to our customer service team for guidance.