CO 4425C UAC SD7H15 Compressor Assembly

It’s an SD7H15 compressor assembly used as a truck A/C compressor to keep the cab cooling system operating correctly. This air conditioning compressor is built for 12-volt applications and is designed to circulate refrigerant and maintain proper system pressures. It’s commonly replaced when the clutch won’t engage, the unit is noisy, leaks, or can’t cool effectively.

Verify the part number and compare key specs on your existing unit, including 12V, 6-groove pulley, 125 mm pulley diameter, and the clocking position. Confirm the port sizes match your lines (18 mm discharge and 21 mm suction) so the truck air conditioning system connections line up correctly. Cross-references can also help confirm interchange when replacing another brand’s SD7H15 compressor assembly.

It’s best to address contamination so the new truck A/C compressor isn’t damaged by debris from the old failure. Many installs include replacing the receiver/drier or accumulator, flushing the system as needed, and correcting the refrigerant oil type and quantity for the air conditioning compressor. Also inspect belt condition, verify clutch power/ground, and check condenser airflow to prevent repeat failures.