Lennox Error Code Hub
Select a code below to open the quick diagnostic page.
Landmark
Error E100
Outdoor Sensor Out of Range
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Error E108
Compressor 1 Contactor Fault
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Error E124
High Discharge Temperature
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Error E131
Low Suction Pressure
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Error E145
Supply Fan Proving Failed
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Error E156
Phase Imbalance Detected
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Error E167
Reversing Valve Circuit Fault
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Error E172
Filter Differential High
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Error E184
Network Communication Timeout
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Error E199
Defrost Termination Failure
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Error E107
Compressor 1 Current Fault
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Error E141
Low Pressure Lockout
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Error E163
Condensate Overflow Switch Open