Troubleshooting steps
Clean condenser coil; check airflow; verify refrigerant charge
HVAC Error Codes
Rheem E4 Error
High pressure switch open
Details
Rheem E4 error indicates the high pressure switch has opened due to excessive pressure.
Error typeSafety Switch
Typical causesDirty condenser; restricted airflow; overcharge
SolutionsClean condenser coil; check airflow; verify refrigerant charge
SeverityHigh
Catalog references
Where this appears
RheemE4
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