Daikin Kombi Error 11 64 signals a flame failure during the ignition sequence. Owners resolve this by inspecting the ignition electrodes and confirming adequate gas supply to the unit first.
Additional verification of the flame sensor and wiring harness prevents repeated lockouts on the boiler control system. These steps restore consistent heating performance without immediate component replacement.
Daikin Kombi 11 64 Flame Indicators Table
Daikin Kombi Error 11 64 appears when the burner fails to establish or maintain a stable flame after multiple ignition attempts. The condition often stems from electrode misalignment or restricted gas delivery rather than a full system breakdown. Technicians use a structured table to match observed symptoms with the most probable causes and required skill levels. This approach narrows the diagnostic path before any disassembly begins. The table below organizes the primary indicators for quick reference during initial troubleshooting.
| Symptom | Primary Suspect | Difficulty 1-5 |
|---|---|---|
| No flame after spark | Ignition electrode | 2 |
| Intermittent lockout | Flame sensor | 3 |
| Gas valve clicks but no ignition | Gas supply pressure | 4 |
| Error returns after reset | Wiring harness | 3 |
Daikin Kombi 11 64 Flame Failure Causes
Flame failure on a Daikin Kombi unit traces back to either insufficient fuel reaching the burner or a sensor that cannot detect the established flame. Electrode gaps widen over time from heat cycling and cause weak spark generation. Low gas pressure from the supply line or a partially closed valve produces the same error code. Corrosion on the flame sensor tip blocks proper signal transmission to the control board. Each of these factors requires separate confirmation before parts are ordered or replaced.
Daikin Kombi Electrode Gap Adjustment Steps
Start by isolating power to the boiler and closing the gas supply valve. Remove the front cover to access the burner assembly. Clean the ignition electrode with a nonabrasive pad and check the gap against manufacturer specifications. Reinstall the electrode and restore gas flow before attempting a test ignition. Monitor the flame through the sight glass during the next cycle to confirm stable operation.
Daikin Kombi Gas Supply Pressure Tests
Gas pressure testing confirms whether the supply meets the minimum threshold required for reliable ignition on Daikin Kombi models. Connect a manometer to the inlet test point on the gas valve. Record the static pressure with the boiler off and the working pressure during a demand call. Readings below the rated value point to a regulator issue or line restriction upstream of the unit. Adjust or repair the supply before proceeding to sensor checks.
Daikin Kombi Flame Sensor Resistance Test
Flame sensor resistance measurements reveal whether the component can generate a usable signal for the control board. Disconnect the sensor lead and attach a multimeter set to ohms. Compare the reading against the expected range listed in the service manual. High resistance indicates oxidation or a cracked insulator that must be addressed. Replace the sensor only after confirming the wiring path shows continuity.
Daikin Kombi Control Board Terminal Issues
Control board connections often loosen from vibration and create false flame failure signals on Daikin Kombi units. Power down the boiler and remove the board cover. Examine each terminal for secure seating and signs of discoloration. Reseat any suspect connectors and apply dielectric grease to exposed pins. Restore power and observe whether the error clears during the next ignition attempt.
Daikin Kombi Error 11 64 Flame Sensor Replacement
Order a replacement ignition electrode kit or flame sensor assembly when test results fall outside acceptable limits. Install the new parts using the original mounting hardware and torque values. Perform a final combustion analysis after reassembly to verify proper flame characteristics.
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