Lennox Ducted Heating

Lennox Ducted Heating Error Code A

Ducted Heating

A means different things on different Ducted Heating models. Enter your model number to see only your reading, or find your model below.

What It Means

  • Indoor Blower Operation: Continuous Fan only mode
  • Cubic feet per minute (cfm) setting for indoor blower (1 second ON, 0.5 second OFF) / cfm setting for current mode displayed.
  • Continuous Fan Mode Only
  • EL280UHEK, EL280UHEK(X): Continupois Fan Mode Only

Causes & actions from Lennox

Indoor Blower Operation: Continuous Fan only mode

7 models

EL195UHNEK, EL195UHNEK-01, EL195UHNEK-02, EL196UHEK, ML180UHVK, ML193DFEK, ML196UHEK

Gas furnace (indoor)

How it shows
  • Integrated control 7-segment display: A

This manual entry does not list further causes or actions.

Applicable models & manual sources

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

5 models

SL280DFNV, SL280UHV, SL297UHNV, SLP98UHV, SLP99UHV

How it shows
  • Integrated control 7-segment display: A

This manual entry does not list further causes or actions.

Applicable models & manual sources
  • SL280DFNV

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

    SL280DFNV manual, page 45

  • SL280UHV

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

    SL280UHV manual, page 52

  • SL297UHNV

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

    SL297UHNV manual, page 55

  • SLP98UHV

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

    SLP98UHV manual, page 62

  • SLP99UHV

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

    SLP99UHV manual, page 30

Continuous Fan Mode Only

9 models

EL297UHEK, ML296UHVK, ML297UH045XV36BK, ML297UH070XV36BK, ML297UH090XV36CK, ML297UH090XV60CK, ML297UH110XV60CK, ML297UH135XV60DK, ML297UHVK

Gas furnace (indoor)

How it shows
  • Integrated control 7-segment display: A

This manual entry does not list further causes or actions.

Applicable models & manual sources

Continupois Fan Mode Only

Models: EL280UHEK, EL280UHEK(X)

Gas furnace (indoor)

How it shows
  • Integrated control 7-segment display: A

Continuous Fan Mode Only

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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