Troubleshooting steps
Check pressure switch operation verify wiring check system pressure
HVAC Error Codes
PR – Pressure switch fault
Pressure switch error detected
Details
Pressure switch is not operating correctly or has failed.
Error typealarm
MeaningPressure switch fault
Typical causesSwitch fault wiring fault pressure issue
SolutionsCheck pressure switch operation verify wiring check system pressure
Severityhigh
Catalog references
Where this appears
TranePR
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FAQ
Common questions
Which pressure switch?
Check both high and low pressure switches.
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