Free DIY appliance repair guides since 2013 Thousands of free guides · Tech replies within 72h
Free Tool

What refrigerant does my unit use?

Pick your appliance and roughly what year it was made.

What refrigerant does my unit use? Overview of the identifier tool and EPA phase-out pathways.
Built in 2018
Don't know the exact year? A rough guess is fine — check the install date on the nameplate if you want to be precise.
AC / Heat Pump
Pathway
R-22
Common in older systems
Phased Out
R-410A
Current standard for most systems
Being Phased Down
R-454B / R-32
Next-gen, lower-GWP (A2L)
The Future
Fridge / Freezer
Pathway
R-12
Banned, pre-1996
Phased Out
R-134a
Common replacement for R-12
Being Phased Down
R-600a
Natural refrigerant, mildly flammable
The Future

Common questions

Look for a data plate or sticker — on AC condensers it's usually on the outdoor unit's side panel; on refrigerators it's typically on the back panel or inside the fresh-food compartment wall. It lists the refrigerant type and the charge amount in ounces or pounds.

No. Different refrigerants have different pressures and oil compatibility. Mixing them can damage the compressor and is not something a technician will do — a refrigerant swap means replacing the system.

A2L refrigerants like R-454B and R-32, and natural refrigerants like R-600a, are classified as "mildly flammable," not explosive. The charge sizes in home equipment are small and the risk is managed through technician training and equipment design — it's not a reason to avoid newer units.

No. The phase-out affects new manufacturing only. Existing R-410A systems can be serviced and refilled for the life of the unit — there's no requirement or deadline to replace a working system.