What replaced my R-410A unit?
Find the model number on the unit outside your house. This table says what the manufacturer replaces it with, and each page says whether you can keep your indoor coil and your copper — or buy a like-for-like R-410A replacement instead, which is still legal in most states.
American Standard
The American Standard swap rules, with sources →
| Your R-410A unit | Type | Tier | Replaced by | Data read |
|---|---|---|---|---|
| 4A7A3 | Air conditioner | Silver 13 Air Conditioner | 5A7A3 | service bulletin only |
| 4A7A4 | Air conditioner | Silver 14 Air Conditioner | 5A7A4 | service bulletin only |
| 4A7A5 | Air conditioner | Silver 15 Air Conditioner | 5A7A5 | service bulletin only |
| 4A6H4 | Heat pump | Silver 14 Heat Pump | 5A6H4 | service bulletin only |
| 4A6H5 | Heat pump | Silver 15 | 5A6H5 | service bulletin only |
Carrier
The Carrier swap rules, with sources →
| Your R-410A unit | Type | Tier | Replaced by | Data read |
|---|---|---|---|---|
| 24ABB3 | Air conditioner | Three-phase Comfort | 26SCA4 | transition guide, spec sheet |
| 24AHA4 | Air conditioner | Three-phase Comfort | No direct replacement listed | transition guide, spec sheet |
| 24SCA4 | Air conditioner | Comfort | 26SCA4 | transition guide, spec sheet |
| 24SCA5 | Air conditioner | Comfort | 26SCA5 | transition guide, spec sheet |
| 24SPA6 | Air conditioner | Performance | 26SPA6 | transition guide, spec sheet |
| 24TP(A/B)7 | Air conditioner | Performance | 26TPA8 | transition guide only |
| 24VNA6 | Air conditioner | Infinity | 27VNA3 | transition guide, spec sheet |
| 24VNA9 | Air conditioner | Infinity | 26VNA1 | transition guide, spec sheet |
| 34SCA5 | Air conditioner | Comfort | 37MURAQ , 37MUHAQ | transition guide only |
| CA16(P/E) | Air conditioner | Three-phase Builder | No direct replacement listed | transition guide only |
| GA4SAN4 | Air conditioner | Builder | GA4SAN5 | transition guide only |
| GA5SAN4 | Air conditioner | Builder | GA5SAN5 | transition guide only |
| GA7TAN4 | Air conditioner | Builder | GA8TAN5 | transition guide only |
| 25HCE4 | Heat pump | Three-phase Builder | 27SCA5 | transition guide, spec sheet |
| 25HPB6 | Heat pump | Three-phase Comfort | No direct replacement listed | transition guide only |
| 25SCA5 | Heat pump | Comfort | 27SCA5 | transition guide, spec sheet |
| 25SPA5 | Heat pump | Performance | 27SPA6 | transition guide only |
| 25TP(A,B)7 | Heat pump | Performance | 27TPA8 | transition guide only |
| 25VNA4 | Heat pump | Infinity | 27VNA3 | transition guide, spec sheet |
| 25VNA8 | Heat pump | Infinity | 27VNA0 | transition guide, spec sheet |
| 38MURAQ**AA3 | Heat pump | Comfort | 37MURAQ | transition guide only |
| 38MURAQ**AB3 | Heat pump | Performance | 37MUHAQ | transition guide only |
| GH5SAN4 | Heat pump | Builder | GH5SAN5 | transition guide only |
| GH7TAN4 | Heat pump | Builder | GH8TAN5 | transition guide only |
This is a starting point, not an approval. Everything here is read from published manufacturer documents and dated, but only the licensed contractor who signs your installation can approve a specific system for your home and your local code. Take the citations on this page to them and ask.