Utica Dunkirk E67 Error Code
Anti-wind activation at maximum power Combustion level out of range Maximum valu
Source: dcc-115__utdu-dcc-115-dcc-205-dcb-75-dcb-165-iom.pdf
What does Utica Dunkirk E67 mean?
E67 is stored in the fault history when the anti-wind function has escalated to maximum power — the fan is running at its highest speed to overcome wind-induced back-pressure at the flue terminal. This is a more severe progression of the E62 anti-wind condition, indicating that normal fan speed compensation has reached its limit without fully restoring combustion stability.
Symptoms
- E67 appears in the fault-history log, often accompanied by E62 or E65.
- Fan audibly runs at maximum speed during burner operation.
- Reduced heating efficiency or intermittent burner operation during high-wind conditions.
- Possible transition to E69 (combustion out of range) if the condition persists.
Common causes
- Flue terminal is exposed to high and sustained wind impingement.
- Flue duct resistance is at or near the maximum allowable for the model, compounding wind sensitivity.
- Flue gas recirculation at the terminal is driving combustion air contamination.
- Damaged or missing vent terminal cap providing no wind protection.
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Diagnostic steps
Inspect the flue terminal for wind exposure
Check the outdoor terminal location. It must not face prevailing winds directly and must meet all manufacturer clearance requirements from walls, eaves, and corners.
Verify terminal cap integrity
Replace a cracked, missing, or non-standard terminal cap. Use only the manufacturer-approved cap style for this model to ensure proper wind resistance.
Check for flue gas recirculation
With the boiler running, observe the terminal for exhaust re-entering the intake. Extend or reposition the vent system if recirculation is present.
Measure flue system resistance
Confirm the total equivalent length of the flue run is within published limits. Reduce unnecessary elbows or increase duct diameter if resistance is excessive.
Review fault-history for E53 and E69
If E53 or E69 appear alongside E67, the combustion system has exceeded its self-correction range. Perform a full combustion analysis and recalibration after correcting the vent issue.
When to call a professional
Call a licensed technician when E67 appears repeatedly or alongside E69, E53, or E92, as the boiler has reached its maximum anti-wind compensation limit. Combustion analysis, flue reconfiguration, and recalibration require specialized test equipment and factory certification. Unresolved anti-wind faults can lead to unsafe combustion conditions.
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Other Utica Dunkirk Error Codes
,E28,E40,E50,E160,E321,and E431 -Indicate possible faulty components. 53 - Indic
, 78 and 92 - Indicates possible wrong calibration, a new calibration is needed.
,E135 - Indicate the gas supply has been interrupted, ignition has failed or fla
,E 133, E 134,E 135, E 09,E 15,E 128 and E 384 - are displayed it is possible to
Gas Valve Connection Cable 日 10 External Probe Fault 12 Water Flow Switch Open 1
Water Refill Enabled E 19 Max Time Of Water Refill 20 Central Heating Flow NTC F
Flue NTC Fault E40 Central Heating Return NTC Fault Hot Water NTC Fault (tank ve
PCB to be set by the "Calibration Function" E 171 Fan parameter Out of range in
87 Communication error E92 Combustion test alarm during auto-setting E 1 109 Pre
E11 between the supply and return temperatures too Sensor not/poorly connected N
Temperature of heat exchanger is above the normal range (high- limit thermostat
5 burner start-up failures that the air inlet and exhaust flue are not blocked C
Sources: dunkirk.com