Troubleshooting steps
Check refrigerant charge verify airflow clean condenser coil check pressure switch
HVAC Error Codes
E2 – High pressure switch
High pressure switch activated
Details
High pressure switch has been triggered indicating excessive system pressure.
Error typealarm
MeaningHigh pressure
Typical causesRefrigerant overcharge restricted airflow dirty condenser coil
SolutionsCheck refrigerant charge verify airflow clean condenser coil check pressure switch
Severityhigh
Catalog references
Where this appears
LennoxE2
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FAQ
Common questions
What causes high pressure?
High pressure is caused by excessive refrigerant or restricted heat rejection.
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