Safety & regulation
AHRI safe refrigerant transition resources
A2L transition guides, education and webinars. Use the installed equipment instructions for mitigation, service clearances and required tools.
Open official resource ↗Opens the publisher’s source in a new tab. PDFs may be large; browser support for page links varies.
Document applicability
- Publisher
- AHRI
- Edition
- Edition varies by model
- Format
- Website
- Region
- United States; confirm local applicability
- Access
- Public entry; some documents or tools may require a manufacturer account
- Index review
- 2026-09-29; confirm the publisher’s current revision before use
- Source
- www.ahrinet.org
Cross-check the diagnosis
These original learning guides explain possible causes and lookalikes. The publisher’s exact-model procedure controls on live equipment.
Build your call worksheet →Before applying this reference
- Match full equipment and controller models, refrigerant, region and document revision.
- Use the unit wiring label and OEM specifications. A related brand name or similar cabinet does not prove compatibility.
- Isolate power, secure against restart and prove it absent before resistance tests or repairs. Follow approved capacitor and inverter discharge procedures.
- Preserve safety interlocks and refrigerant mitigation. Stop on unsafe conditions or suspected leakage.