E17
Utica
Internal Control Board Fault
Boiler displays E17 and locks out, often after a power surge or lightning storm
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Damaged microprocessor, Corrupted firmware, Burned circuit traces from surge, Shorted low-voltage circuit
How to Fix / Troubleshooting
Safety first: Turn off power. Do not attempt to repair the control board at component level.
- Inspect board visually: Remove the control board cover on the Utica boiler and look for burned components, bulging capacitors, or soot marks.
- Check external shorts: Disconnect external low-voltage loads (thermostat, sensors) one at a time to rule out a shorted accessory causing the fault.
- Power cycle: After disconnecting non-essential loads, restore power briefly to see if E17 clears. If not, the board is likely damaged.
- Replace board: Order the exact Utica replacement control board. Transfer any configuration jumpers or DIP switch settings per the installation manual. This work is best done by a qualified technician.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control Board
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