KeepRite *CA648 Error Codes

Updated October 13, 2026 · by Aurora Star Tech Inc.

KeepRite *CA648 error codes and diagnostic codes. The *CA648 is a KeepRite air conditioner in the KeepRite *CA/*CH Two-Stage Communicating series.

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KeepRite *CA648 error codes list

Code	Meaning	Severity
16	Lost communication with wall control	Medium
25	Model plug missing or invalid	High
31	High pressure switch open	High
32	Low pressure switch open	High
45	Outdoor control board failure	High
46	Brown-out (low voltage)	Medium
47	No 230 V at the unit	High
53	Outdoor air temperature sensor fault	Medium
55	Outdoor coil sensor fault	Medium
56	Air and coil sensors disagree	Medium
71	Low stage thermal cutout	High
72	Compressor thermal cutout (two-stage: high stage)	High
73	Contactor stuck closed	High
74	No 230 V at compressor	High
81	Low stage thermal lockout	High
82	Thermal lockout (two-stage: high stage)	High
83	Low pressure lockout	High
84	High pressure lockout	High

Troubleshooting the *CA648

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General guidance for qualified technicians. The manufacturer's installation and service manual and local codes always take priority. Aurora Star Tech is not affiliated with, endorsed by or sponsored by any equipment manufacturer; brand and model names are used only to identify equipment and belong to their owners.

KeepRite *CA648 error codes list

Troubleshooting the *CA648

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