Lennox Split & Multi-Split

Lennox Error Code EC 56

Split & Multi-Split: Mini-split unit (indoor)

What It Means

  • Indoor unit #1 coil outlet temperature sensor error (T2B for multi-zone) Indoor unit #2 coil outlet temperature sensor error (T2B for multi-zone) Indoor unit #3 coil outlet temperature sensor error (T2B for multi-zone) Indoor unit #4 coil outlet temperature sensor error (T2B for multi-zone) Indoor unit #5 coil outlet temperature sensor error (T2B for multi-zone) Indoor unit #6 coil outlet temperature sensor error (T2B for multi-zone)

Causes & actions from Lennox

How it shows
  • 507550 indoor display: EC 56

This manual entry does not list further causes or actions.

Applicable models & manual sources
  • M33C

    Indoor unit #1 coil outlet temperature sensor error (T2B for multi-zone) Indoor unit #2 coil outlet temperature sensor error (T2B for multi-zone) Indoor unit #3 coil outlet temperature sensor error (T2B for multi-zone) Indoor unit #4 coil outlet temperature sensor error (T2B for multi-zone) Indoor unit #5 coil outlet temperature sensor error (T2B for multi-zone) Indoor unit #6 coil outlet temperature sensor error (T2B for multi-zone)

    M33C, MWMC, 3WMC

    M33C manual, page 8

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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