Lennox Split & Multi-Split

Lennox Error Code C5 0

Split & Multi-Split

C5 0 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

  • EL18XCV, EL18XPV: Compressor capacity demand percentage; source example C5 0 is 50% demand with S30 communicating thermostat.
  • EL19KPV, EL22KCV: Compressor capacity demand percentage; source example C5 0 is 50% demand with S40 communicating thermostat.

Causes & actions from Lennox

Compressor capacity demand percentage; source example C5 0 is 50% demand with S30 communicating thermostat.

Models: EL18XCV, EL18XPV

How it shows
  • Outdoor control 7-segment display: C5 0

When installed with an iComfort S30 communicating thermostat the display will show the demand as a percentage. i.e. C 5 0.

Other manual wording

EL18XCV

When the EL18XCV unit is installed with a iComfort S30 communicating thermostat, the display will show the demand as a percentage (e.g., C 5 0 for 50% demand).

Applicable models & manual sources
  • EL18XPV

    Compressor capacity demand percentage; source example C5 0 is 50% demand with S30 communicating thermostat.

    EL18XPV manual, page 64

  • EL18XCV

    Compressor capacity demand percentage; source example C5 0 is 50% demand with S30 communicating thermostat.

    EL18XCV manual, page 62

Compressor capacity demand percentage; source example C5 0 is 50% demand with S40 communicating thermostat.

Models: EL19KPV, EL22KCV

Heat pump (outdoor)

How it shows
  • Outdoor control 7-segment display: C5 0

When the EL19KPV unit is installed with a S40 communicating thermostat, the display will show the demand as a percentage (e.g. C 5 0 for 50%).

Other manual wording

EL22KCV

When the EL22KCV unit is installed with an S40 communicating thermostat the display will show the demand as a percentage. i.e. C 5 0.

Applicable models & manual sources
  • EL19KPV

    Compressor capacity demand percentage; source example C5 0 is 50% demand with S40 communicating thermostat.

    EL19KPV manual, page 67

  • EL22KCV

    Compressor capacity demand percentage; source example C5 0 is 50% demand with S40 communicating thermostat.

    EL22KCV manual, page 64

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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