Step 4: Press lower right "Next" button and the display will flash and show the number of any Lockout codes.
Step 5: Press lower right "Next" button and the display will show the temperature sensor reading.
Step 6: Press lower right "Next" button and the display will show the manual firing rate adjustment. This function is not
currently used. Any adjustment made has no effect.
Step 7: Press "Done" button on lower left to exit Diagnostic Mode back to DHW setpoint in the User Mode.
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