Lennox Refrigerant Compatibility Guide
Find the correct refrigerant, recharge specs, and troubleshooting help for Lennox residential and light-commercial systems.
- OEM‑Accurate Refrigerant Match
- Model Lookup by Prefix
- Error Code Reference
- Fast Nationwide Shipping
Compatible Refrigerants
R‑410A
Used across most Lennox residential split systems installed over the past decade.
Opteon™ XL41 (R-454B)
Lennox's newest Signature-series platforms are adopting this Chemours-branded refrigerant.
R‑22
Older Lennox units from before the mid-2010s may still run R-22.
Model Lookup table
| Model Prefix | Series | Refrigerant | Typical Capacity |
|---|---|---|---|
| XC / EL | Elite / Merit Series | R-410A | 1.5–5 Ton |
| SL2 | Signature Series (newest) | R-410A / Opteon XL41 | 2–5 Ton |
| LGH / LRP | Commercial Packaged | R-410A | 3–25 Ton |
| HS2 / G* | Legacy Split System | R-22 | 1.5–5 Ton |
Error Code table
| Code | Meaning | Refrigerant‑Related? |
|---|---|---|
| 200 | Low pressure switch open | Yes check charge & leaks |
| 201 | High pressure switch open | Yes check overcharge/airflow |
| 411 | Low suction pressure detected | Yes possible undercharge |
Signature Series and the Move to Opteon XL41
Lennox's top-tier equipment line is leading its transition to R-454B, following the same Chemours branding used by Trane and American Standard.
R-410A vs. Opteon XL41 on Lennox Equipment
The two refrigerants are not interchangeable, and Lennox's tiered rollout means a technician can't assume refrigerant type from equipment age alone a brand-new Elite-series unit may still run R-410A while a Signature-series unit from the same year runs Opteon XL41.
Servicing Signature-Series Equipment
Since Signature-series equipment is built specifically for A2L refrigerant handling, confirming A2L-rated recovery and storage equipment before a service call is essential, not optional, on this platform.
Legacy R-22 Lennox Systems
Older Lennox residential systems, particularly HS2-series units and earlier, may still run R-22 and depend on reclaimed supply for continued service.
Frequently Asked Questions
Check the model number prefix against the lookup table above, or read the dataplate directly refrigerant type varies by product tier, not just age.
Yes. Opteon XL41 is Chemours' brand name for R-454B, used on Lennox's Signature-series equipment.
No only the Signature tier has fully transitioned; Elite and Merit-series equipment may still run standard R-410A.
Code 200 indicates a low pressure switch has opened, usually from an undercharge or a leak.
Servicing a Lennox System Today?
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