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Known issue: Goodman / Amana indoor coil refrigerant leaks (formicary corrosion) - diagnose and refer

Several proposed class actions (Pennsylvania 2014, North Carolina, Arizona) alleged that Goodman and Amana copper evaporator coils leak refrigerant prematurely, claiming the company knew since about 2007; at least one court refused to certify a class, and no settlement was found. The industry cause most often cited for pinhole leaks in copper indoor coils is formicary corrosion. Goodman's parts warranty generally covers the coil, not labor, and requires registration. Leak search and coil replacement are EPA 608 refrigerant work.

Cross-checked ~60 min advancedBrands: Goodman, Amana

Before you start

  • Refrigerant circuit work (gauges, leak search, recovery, brazing, recharge) is EPA 608 work: refer
  • Disconnect power before opening the coil or air handler panels; capacitors and contactors are line voltage

Diagnostic steps

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OnCall Tech is a reference tool for trained technicians and can make mistakes. Always disconnect power and confirm with the manufacturer's documentation before you work.

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Known issue: Goodman / Amana indoor coil refrigerant leaks (formicary corrosion) - diagnose and refer · OnCall Tech