**It’s worth checking, but 21 amps alone doesn’t mean your compressor is failing.** That’s about 19% above 17.6 amps.

If the label says **RLA (Rated Load Amps)**, that’s a reference rating used for electrical sizing—not necessarily the compressor’s maximum allowable running current. Actual current depends on operating conditions and the specific compressor. [Copeland explains RLA here.](https://copeland.custhelp.com/app/answers/detail/a_id/5342)

Two details matter:

- **Startup or steady running?** A brief startup surge is expected. A steady 21-amp reading after several minutes deserves further evaluation.
- **Compressor alone or entire outdoor unit?** A reading on the unit’s incoming power includes the condenser fan, so it isn’t directly comparable to the compressor’s RLA.

If it’s consistently drawing 21 amps on the compressor alone, have an HVAC technician check operating voltage, capacitor, condenser airflow, refrigerant pressures, and the manufacturer’s expected current for those conditions. A dirty condenser can increase compressor energy use. [Carrier’s guidance](https://www.carrier.com/us/en/residential/hvac-resources/air-conditioners/how-to-clean-an-ac-unit/)

**Turn it off if it trips the breaker repeatedly, struggles to start, smells burned, or the outdoor fan stops while the compressor runs.** Avoid probing inside the powered electrical compartment.

Was the 21 amps measured during startup or while running steadily—and on a compressor wire or the unit’s incoming supply?