Lennox Split & Multi-Split

Lennox Error Code c

Split & Multi-Split

c 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: To clear error codes stored in memory, continue to HOLD push button while the three horizontal bars are displayed. Release push button when solid c is displayed.
  • CBK48MVT: Clear-history branch: continue holding while solid bars displayed, release when solid c appears. Solid c starts blinking. Display blinks up to10seconds; press and release during window to confirm deletion. If10seconds expire OR pushbutton is not released, exit error mode without deleting history.
  • CBK48MVT: Push and hold for one (1) second, release button. Seven-segment will display 0000 and exit error recall mode.
  • CBX40UHV: Push button to confirm command to delete codes. Error codes are cleared.

Causes & actions from Lennox

To clear error codes stored in memory, continue to HOLD push button while the three horizontal bars are displayed. Release push button when solid c is displayed.

Models: CBK48MVT, CBX40UHV

Air handler (indoor)

How it shows
  • Single-character display: c

This manual entry does not list further causes or actions.

Applicable models & manual sources
  • CBK48MVT

    To clear error codes stored in memory, continue to HOLD push button while the three horizontal bars are displayed. Release push button when solid c is displayed.

    CBK48MVT manual, page 50

  • CBX40UHV

    To clear error codes stored in memory, continue to HOLD push button while the three horizontal bars are displayed. Release push button when solid c is displayed. Display will blink.

    CBX40UHV manual, page 20

Clear-history branch: continue holding while solid bars displayed, release when solid c appears. Solid c starts blinking. Display blinks up to10seconds; press and release during window to confirm deletion. If10seconds expire OR pushbutton is not released, exit error mode without deleting history.

Models: CBK48MVT

How it shows
  • Single-character display: c

This manual entry does not list further causes or actions.

Applicable models & manual sources
  • CBK48MVT

    Clear-history branch: continue holding while solid bars displayed, release when solid c appears. Solid c starts blinking. Display blinks up to10seconds; press and release during window to confirm deletion. If10seconds expire OR pushbutton is not released, exit error mode without deleting history.

    CBK48MVT manual, page 62

Push and hold for one (1) second, release button. Seven-segment will display 0000 and exit error recall mode.

Models: CBK48MVT

How it shows
  • Single-character display: c

This manual entry does not list further causes or actions.

Applicable models & manual sources
  • CBK48MVT

    Push and hold for one (1) second, release button. Seven-segment will display 0000 and exit error recall mode.

    CBK48MVT manual, page 50

Push button to confirm command to delete codes. Error codes are cleared.

Models: CBX40UHV

Air handler (indoor)

How it shows
  • Single-character display: c

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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