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

Copy-paste helpers

Troubleshooting steps

Check reversing valve operation verify wiring check solenoid replace valve if faulty

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FAQ

Common questions

What is reversing valve?

Reversing valve switches system between heating and cooling modes.

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