Lennox Split & Multi-Split

Lennox Split & Multi-Split Error Code A

Split & Multi-Split

A 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

  • CBK48MVT, CBX40UHV: Release push button - control cycles indoor blower on for ten seconds at 70% of maximum air for selected capacity size unit. Control will automatically exit current active mode.
  • CBK48MVT: Cubic feet per minute (cfm) setting for indoor blower (1 second ON, 0.5 second OFF) / cfm setting for current mode displayed. Example: A1200
  • CBX40UHV: Delivered CFM. Example: A1200

Causes & actions from Lennox

Release push button - control cycles indoor blower on for ten seconds at 70% of maximum air for selected capacity size unit. Control will automatically exit current active mode.

Models: CBK48MVT, CBX40UHV

Air handler (indoor)

How it shows
  • Single-character display: A

INDOOR BLOWER TEST: Release push button - control cycles indoor blower on for ten seconds at 70% of maximum air for selected capacity size unit. Control will automatically exit current active mode.

Other manual wording

CBK48MVT

This manual entry does not list further causes or actions.

Applicable models & manual sources
  • CBX40UHV

    Release push button − control cycles indoor blower on for ten seconds at 70% of maximum air for selected capacity size unit. Control will automatically exit current active mode.

    CBX40UHV manual, page 20

  • CBK48MVT

    Release push button - control cycles indoor blower on for ten seconds at 70% of maximum air for selected capacity size unit. Control will automatically exit current active mode.

    CBK48MVT manual, page 50

Cubic feet per minute (cfm) setting for indoor blower (1 second ON, 0.5 second OFF) / cfm setting for current mode displayed. Example: A1200

Models: CBK48MVT

How it shows
  • Single-character display: A

This manual entry does not list further causes or actions.

Applicable models & manual sources
  • CBK48MVT

    Cubic feet per minute (cfm) setting for indoor blower (1 second ON, 0.5 second OFF) / cfm setting for current mode displayed. Example: A1200

    CBK48MVT manual, page 49

Delivered CFM. Example: A1200

Models: CBX40UHV

Air handler (indoor)

How it shows
  • Single-character display: A

Delivered CFM. Example: A 1200

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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