What It Means
- Refrigerant Leak Detector Sensor #2 Communication lost
- Refrigerant Leak Detector #2 Communication lost
Lennox Ducted Heating
Lennox Error Code E155
Ducted Heating
E155 means different things on different Ducted Heating models. Enter your model number to see only your reading, or find your model below.
Causes & actions from Lennox
Refrigerant Leak Detector Sensor #2 Communication lost
8 models
EL180UHNE(K), EL195UHNEK, EL195UHNEK-01, EL195UHNEK-02, EL196UHEK, ML180UHVK, ML193DFEK, ML196UHEK
Gas furnace (indoor)
How it shows
- Integrated control 7-segment display: E155
There may be an issue with the wiring harness connecting the sensor #2 to the furnace control board, either with the wiring itself or with the connector. Check the wiring and the connector for damage or improper connectivity. Check the sensor for damage or obstruction on the harness plug. This fault clears when communications with the sensor has been reestablished, but blower latches for a minimum of 5 minutes. Retest of the presence of fault can be effected by pressing the Low GWP test button on the furnace unit control board
Applicable models & manual sources
- EL180UHNE(K)
Refrigerant Leak Detector Sensor #2 Communication lost
- EL195UHNEK
Refrigerant Leak Detector Sensor #2 Communication lost
EL195UHNEK, EL195UHNEK-01, EL195UHNEK-02
- EL196UHEK
Refrigerant Leak Detector Sensor #2 Communication lost
- ML180UHVK
Refrigerant Leak Detector Sensor #2 Communication lost
- ML193DFEK
Refrigerant Leak Detector Sensor #2 Communication lost
- ML196UHEK
Refrigerant Leak Detector Sensor #2 Communication lost
- ML196UHEK
Refrigerant Leak Detector Sensor #2 Communication lost
Refrigerant Leak Detector #2 Communication lost
11 models
EL280UHEK, EL280UHEK(X), EL297UHEK, ML296UHVK, ML297UH045XV36BK, ML297UH070XV36BK, ML297UH090XV36CK, ML297UH090XV60CK, ML297UH110XV60CK, ML297UH135XV60DK, ML297UHVK
Gas furnace (indoor)
How it shows
- Integrated control 7-segment display: E155
There may be an issue with the wiring harness connecting the sen- sor #1 to the furnace control board, either with the wiring itself or with the connector. Check the wiring and connector for damage or improper connectivity. Check the sensor for damage or obstruction on the harness plug. This fault clears when communicati9ons with the senor has been reestablished, but blower latches for a minimum 5 minutes. Retest of the presence of fault can be effected by press- ing the LOW GWP test button on the furnace unit control board.
Applicable models & manual sources
- EL280UHEK
Refrigerant Leak Detector #2 Communi- cation lost
EL280UHEK, EL280UHEK(X)
- EL297UHEK
Refrigerant Leak Detector #2 Communi- cation lost
- ML296UHVK
Refrigerant Leak Detector #2 Communi- cation lost
- ML297UH045XV36BK
Refrigerant Leak Detector #2 Communi- cation lost
ML297UH045XV36BK, ML297UH070XV36BK, ML297UH090XV36CK, ML297UH090XV60CK, ML297UH110XV60CK, ML297UH135XV60DK, ML297UHVK
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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