To add refrigerant to a refrigerator, first turn off the unit and locate the condenser coils on the back or bottom. Use a manifold gauge set to measure system pressure. If pressure is below the manufacturer’s specified range, inject refrigerant slowly through the Schrader valve while monitoring pressure. Ensure proper ventilation and wear protective gear. Avoid overcharging, as it can reduce efficiency or damage components.

The process requires adherence to EPA guidelines due to refrigerant regulations and environmental concerns. The EPA mandates that only certified technicians handle refrigerants like R-600a or R-134a to prevent leaks, which contribute to ozone depletion and global warming. According to the EPA, improper refrigerant handling accounts for 10% of total U.S. refrigerant emissions, costing the industry $500 million annually in lost productivity and penalties. Additionally, overcharging reduces cooling efficiency by 15–20%, increasing energy consumption and utility costs. The Department of Energy (DOE) reports that correctly charged systems operate 30% more efficiently, aligning with energy-saving standards. Proper refrigerant levels ensure optimal performance, longevity, and compliance with environmental laws, making professional assistance or EPA-certified training critical for safe and effective refills.