Sub-Zero Refrigerator Heat Exchanger 7015718, Replaces 4250960

OEM refrigerator-side heat exchanger assembly/service part for select Sub-Zero 532 and 550 refrigerators, with applicability determined by model and serial-number range.

Is This the Right Part?

✅ Cross Reference Information

Common Symptoms

• Refrigerator compartment is warm or does not hold its temperature setpoint.
• Food in the refrigerator compartment spoils sooner than expected.
• These conditions are not specific to the heat exchanger; Sub-Zero notes that fans, controls, compressor/evaporator/condenser issues, and door sealing can also cause cooling complaints.

Check Before Replacing

• Check the refrigerator compartment setpoint and allow 24 hours after a setting correction.
• Verify the refrigerator door closes fully and inspect the door gasket for damage or obstruction.
• If applicable, clean the condenser when it has not been cleaned within the prior six months.
• Determine whether only the refrigerator section or multiple sections are warm; do not open or test the sealed refrigerant circuit.
• If cooling does not recover after these checks, arrange Factory Certified Service for sealed-system diagnosis.

Pro Tip

Part Details

Key Features

• Sub-Zero refrigerator-side heat exchanger.
• OEM service part designation: "HEAT EXCHANGER, ASSY SVCE."
• Sealed-system component for the refrigerator cooling side.

Installation Notes

• Replacement involves the sealed refrigerant system and should be diagnosed and performed by qualified, factory-certified sealed-system service personnel.
• Do not treat a warm refrigerator compartment as proof that this heat exchanger has failed; complete the non-invasive checks first.
• Confirm model and serial-number applicability before installation.

Verified Compatible Models

532, 550

Fitment reminder: Match the complete appliance model number, including suffix or revision where applicable, before ordering.