To clear error codes on a Rinnai tankless water heater, you must first resolve the underlying mechanical or electrical malfunction causing the fault, as error codes are safety lockouts. Prerequisite: Diagnose and repair the root cause (such as a dirty flame sensor, closed gas valve, or scaled heat exchanger). Once repaired, you can clear the error code from the digital controller by turning the controller power switch off and back on, or by unplugging the unit's electrical power cord for 60 seconds to reset the computer board. Verification: Check the digital monitor screen to ensure the numerical error code has disappeared and hot water operation resumes normally.
1 votes
Marked as accepted