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Lennox Mini Split EC07 Error Code

Updated 2026-08-29 · review status: draft Draft - unverified

Quick answer

[3WMC Indoor Units] The outdoor fan speed is operating outside of the normal range. EC.

Severity: high · DIY difficulty: intermediate

Safety

TBD - must be written per-code before publish

What EC07 means

[3WMC Indoor Units] The outdoor fan speed is operating outside of the normal range. EC.

Causes, ranked

  1. Causes not yet documented — verify against the service manual.

Commonly searched as: "lennox ec07" · "lennox error code ec07" · "lennox air conditioner ec07"

Sources

  • SplitAtlas manual-sourced reference — verified 2026-08-29