Lennox Split & Multi-Split

Lennox Split & Multi-Split Error Code E8

Split & Multi-Split

E8 means different things on different Split & Multi-Split models. Enter your model number to see only your reading, or find your model below.

What It Means

  • Programmable Wired Controller: Indoor fan motor zero-crossing signal detection error (AC motor)
  • Programmable Wired Controller: Indoor fan speed error (DC motor)
  • Outdoor DC fan speed error.
  • MLA, MPA, MPB: Outdoor fan speed malfunction

Causes & actions from Lennox

Indoor fan motor zero-crossing signal detection error (AC motor)

Models: Programmable Wired Controller

Mini-split unit

How it shows
  • 507550 wired controller: E8

This manual entry does not list further causes or actions.

Applicable models & manual sources

Indoor fan speed error (DC motor)

Models: Programmable Wired Controller

Outdoor DC fan speed error.

10 models

3WMB036, M22A, M33A, M33B, MCFA, MCFB, MMDA, MMDB, MWMA, MWMB

Mini-split unit (indoor)

How it shows
  • corp1816 old indoor display: E8

This manual entry does not list further causes or actions.

Applicable models & manual sources
  • MWMA

    Outdoor DC fan speed error.

    MWMA, MWMB, 3WMB036, M22A, M33A, M33B, MMDA, MMDB, MCFA, MCFB

    MWMA manual, page 6

Outdoor fan speed malfunction

Models: MLA, MPA, MPB

Mini-split unit (outdoor)

How it shows
  • corp1816 multizone outdoor display: E8
  • corp1816 new indoor error: F5

This manual entry does not list further causes or actions.

Applicable models & manual sources
Disclaimer: This information is for general reference. Code wording and instructions vary by model. Always follow the service manual for your exact unit.

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