Troubleshooting steps
Check reversing valve operation verify wiring check solenoid replace valve if faulty
HVAC Error Codes
E9 – Reversing valve fault
Reversing valve error detected
Details
Reversing valve is not operating correctly or has failed.
Error typealarm
MeaningReversing valve fault
Typical causesValve stuck wiring fault solenoid fault
SolutionsCheck reversing valve operation verify wiring check solenoid replace valve if faulty
Severityhigh
Catalog references
Where this appears
CarrierE9
Utilities
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FAQ
Common questions
What is reversing valve?
Reversing valve switches system between heating and cooling modes.
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