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Refrigerant overcharge or undercharge.

Compressor Cycles (Other Than Normally Satisfying Thermostat) - Incorrect refrigerant level.

Bryant · Comfort Alert Diagnostic Module

What does Refrigerant overcharge or undercharge. mean?

The amount of refrigerant in the system is too high or too low. This disrupts normal operation, causing the compressor to cycle on and off erratically.

Common Causes

  • Improper initial charging.
  • Refrigerant leak (undercharge).
  • Overcharging during previous service.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Ensure the air filter is clean and airflow is not restricted.

  2. 2

    Check the thermostat settings to confirm they are appropriate for the season and desired temperature.

  3. 3

    Contact a qualified technician to check the refrigerant levels and adjust as necessary.

Browse all codes in this manual (55)
Verified technical data. Last updated: April 2026

Related Faults

ALERT LED * flashes Yellow (misreported)Yellow ALERT LED * flashes (misreported) — Welded Contactor checkALERT LED 2 flashes YellowYellow ALERT LED 2 flashes — System pressure trip or compressor overloadALERT LED 3 flashes YellowYellow ALERT LED 3 flashes — Compressor short cycling
Source: Bryant Comfort Alert Diagnostic Module
Open Manual (Page 33)Search more codes in this manual