Lennox Split & Multi-Split

Lennox Split & Multi-Split Error Code 17

Split & Multi-Split: Heat pump (outdoor)

What It Means

  • 4-way vavle converse abnormal

Causes & actions from Lennox

How it shows
  • el18kslv outdoor fault display: 17
  • el18kslv pcb fault led: 17

Outdoor defrost sensor Tc>28℃ and aftercompressor start 10 minutes

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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