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25

Error 25 — Compressor overcurrent (main board)

Lennox · EL18KSLV Series Outdoor Units

What does 25 mean?

The main control board's software has detected that the compressor current is too high, based on EEPROM settings.

Common Causes

  • Compressor over current detected by main control board software
  • EEPROM settings incorrect

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the compressor current draw.

  2. 2

    Verify the EEPROM settings are correct.

  3. 3

    Inspect compressor wiring for loose connections.

Browse all codes in this manual (43)
Verified technical data. Last updated: April 2026

Related Faults

1Error 1 — EEPROM malfunction or damage10Error 10 — Outdoor defrost sensor failure11Error 11 — Suction temperature sensor failure
Source: Lennox EL18KSLV Series Outdoor Units
Open Manual (Page 66)Search more codes in this manual