Utica Dunkirk E36 Error Code
Flame loss No ionization current Check the operation and setting of the gas valv
Source: dmg-240__utdu-dmg-240-iom.pdf
What does Utica Dunkirk E36 mean?
E36 on the Utica-Dunkirk DMG-240 condensing boiler indicates flame loss — the burner ignited successfully during the ignition sequence but the flame was subsequently lost during normal operation. The ionization sensor stopped detecting current while the gas valve was open, causing the boiler to shut down the gas valve and lock out for safety.
Symptoms
- Boiler lights and runs briefly, then shuts down displaying E36
- Burner flame visible then extinguishes unexpectedly mid-cycle
- Boiler may complete several heating cycles before E36 appears
- Low ionization current may be noted during flame-proving with service tools
Common causes
- Insufficient gas supply pressure causing flame instability
- Partially blocked flue duct causing combustion air starvation
- Flue gas recirculation contaminating combustion air
- Contaminated or worn ionization electrode with weak signal
- Gas valve not fully opening or modulating incorrectly
Ask the AskWhiz AI about Utica Dunkirk E36
AskWhiz
online
Diagnostic steps
Verify gas supply pressure under load
Measure dynamic gas pressure at the boiler inlet test port while the burner is firing at high input. Pressure must not drop below 3.5" w.c. for natural gas; pressure drop under load indicates undersized supply.
Inspect the ionization electrode
Remove and inspect the electrode for carbon deposits, cracks, or incorrect gap. Clean the electrode tip and verify the gap is set to specification; a weak ionization signal drops below the 3 µA threshold and causes E36.
Check for flue gas recirculation
Inspect the flue terminal position relative to the air inlet. Recirculated flue gas reduces available oxygen and quenches the flame during modulating operation.
Inspect the flue for partial blockage
Check the full flue run for restrictions such as debris, sagging duct, or improper bends that could reduce air flow to the burner.
Check gas valve operation
Verify gas valve modulation cable connection and wiring integrity. A valve that opens partially or modulates erratically causes intermittent flame loss. Perform automatic calibration after any combustion work.
When to call a professional
If E36 recurs after checking gas pressure and cleaning the electrode, the gas valve, combustion air system, or flue installation requires professional diagnosis. Combustion analysis with a calibrated flue gas analyzer is needed to verify CO and CO2 levels, and gas valve adjustment or replacement must be performed by a licensed technician authorized to work on gas-fired equipment.
Stop searching through PDFs. Our AI assistant on WhatsApp is trained on official Utica Dunkirk documentation and can diagnose this fault code and guide you through the repair in minutes.
Free tier — 10 messages/month, no credit card.
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