How to tell
The outdoor unit’s data plate lists the refrigerant it uses. Older systems are the ones most likely to use R-22; newer systems use other refrigerants.
What the phase-out means
R-22 was phased out because of its effect on the ozone layer. What remains available for repairs is recovered from old equipment and cleaned, or already in stock, so it is scarce.
A different refrigerant cannot simply be added to an R-22 system. The refrigerants and the oils they use are not interchangeable, and mixing them can damage the system.
Usually worth keeping running
- The system cools well and has no leak
- A repair is electrical, such as a capacitor, contactor or fan motor
Usually time to plan a replacement
- The system is low on refrigerant and the leak cannot be repaired reliably
- The compressor or a coil has failed
- Repairs are becoming regular
Planning ahead
Replacing an R-22 system on your own schedule, rather than in the middle of a heat wave, gives time to size the new system properly and compare options.