Lennox Ducted Heating

Lennox Ducted Heating Error Code E151

Ducted Heating

E151 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

  • Refrigerant Leak Detector Sensor #1 fault
  • SL280UHV: A2L Sensor fault (sensor problem) (communication mode only)

Causes & actions from Lennox

Refrigerant Leak Detector Sensor #1 fault

19 models

EL180UHNE(K), EL195UHNEK, EL195UHNEK-01, EL195UHNEK-02, EL196UHEK, EL280UHEK, EL280UHEK(X), EL297UHEK, ML180UHVK, ML193DFEK, ML196UHEK, ML296UHVK, ML297UH045XV36BK, ML297UH070XV36BK, ML297UH090XV36CK, ML297UH090XV60CK, ML297UH110XV60CK, ML297UH135XV60DK, ML297UHVK

Gas furnace (indoor)

How it shows
  • Integrated control 7-segment display: E151

The refrigerant detection sensor #1 in the unit is reporting an issue that prevents it from functioning properly, and replacement of the sensor may be necessary. This fault clears when the sensor no longer reports the presence of a fault condition.

Other manual wording

EL280UHEK, EL280UHEK(X), EL297UHEK, ML296UHVK, ML297UH045XV36BK, ML297UH070XV36BK, ML297UH090XV36CK, ML297UH090XV60CK, ML297UH110XV60CK,…

The refrigerant detection sensor #1 in the unit is reporting an issue that prevents it from functioning properly and replacement of the sensor may be necessary. This fault clears when the sensor no lon- ger reports the presence of a fault condition

Applicable models & manual sources

A2L Sensor fault (sensor problem) (communication mode only)

Models: SL280UHV

How it shows
  • Integrated control 7-segment display: E151

A2L Sensor fault (sensor problem) (communication 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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