Heater displays E17; may be associated with very high outlet water temperature

Safety: Allow the heater and plumbing to cool before servicing. Hot water can cause burns.

• Check system valves: Verify that any external bypass valves are correctly adjusted and not restricting flow through the heater.
• Inspect internal bypass: On Sta-Rite heaters with an internal bypass assembly, check for stuck or broken bypass components that could alter flow patterns.
• Test outlet sensor: Measure resistance of the outlet temperature sensor and compare to Sta-Rite charts. Replace if out of range.
• Evaluate for scale: Excessive temperature rise may indicate a scaled heat exchanger. Consider professional descaling or replacing the Sta-Rite heat exchanger.