The Daikin Kombi 11 64 error often stems from worn ignition electrodes that fail to produce a consistent spark across the burner gap. Technicians confirm this by measuring resistance across the electrode leads before any disassembly begins, as values exceeding 5 kΩ typically indicate degradation in the ceramic insulator or conductive rod that prevents reliable high-voltage discharge. Proper preparation avoids
damage to surrounding components during removal while also allowing verification that the ignition transformer output
Daikin Kombi 11 64 Electrode Resistance Test
When addressing the Daikin Kombi 11 64 error in your boiler troubleshooting guide, checking the electrode resistance provides a key diagnostic step. Technicians measure the resistance across the electrode to identify faults that could prevent proper ignition. This test ensures that any underlying electrical issues are pinpointed before further repairs are attempted.
Daikin Kombi 11 64 Supply Isolation Steps
Work on a Daikin Kombi boiler demands isolation of both power and gas supplies before any internal access to prevent accidental energization of the ignition circuit or gas release during electrode handling. Confirm the system pressure sits between 1.0 and 1.5 bar on the gauge because deviations can mask underlying combustion problems or create unsafe conditions when the burner is later tested. Wear insulated gloves to protect against residual heat in the combustion chamber, which can exceed 60 °C even after shutdown and risk burns when accessing the electrode assembly mounted near the burner head. These precautions also protect the flue sensor and gas valve components from electrostatic discharge or mechanical stress during the procedure.
Turn off the main isolation switch.
Close the gas cock at the boiler inlet. Allow the unit to cool for at least thirty minutes.
Daikin Kombi 11 64 Electrode Removal Steps
When troubleshooting the Daikin Kombi 11 64 error, removing the electrode assembly provides direct access to critical ignition components whose precise positioning relative to the burner ports determines spark reliability. This step enables thorough inspection for wear or buildup that disrupts boiler operation by increasing the required breakdown voltage beyond the transformer’s capability. Careful disassembly prevents further issues during the repair process, such as misalignment that could cause flame rectification faults or damage to the burner head itself.
Remove the front cover by unscrewing the retaining clips on each side. Locate the electrode assembly mounted on the burner. Disconnect the wiring harness and unscrew the mounting bracket.
Install new electrodes by aligning the tips with the burner ports. Apply thread sealant to the new fittings.
Reconnect the leads and restore power. Test the boiler through a full ignition cycle while monitoring the display for code clearance.
Daikin Kombi 11 64 Gas Pressure Check
Performing an inlet pressure test forms a key step in resolving the Daikin Kombi 11 64 error during boiler troubleshooting because insufficient gas supply directly reduces flame ionization current and can trigger repeated ignition lockouts even with new electrodes fitted. The procedure measures incoming gas pressure at the unit to confirm it falls within manufacturer specifications of approximately 20 mbar at the inlet test point under full load demand. Proper execution isolates whether low supply or internal components trigger the fault code by comparing static and working pressures across the gas valve.
Low inlet pressure can mimic an electrode fault on the Daikin Kombi model. Attach a manometer to the inlet test point after removing the screw cap. Record the reading with the boiler demanding heat.
Adjust the regulator if pressure falls below the manufacturer minimum. This verification rules out supply issues before deeper component replacement.
| Component | Expected Reading | Action If Low |
|---|---|---|
| Inlet gas pressure | 20 mbar | Contact gas supplier |
| Burner pressure | 12-15 mbar | Replace gas valve |
Daikin Kombi 11 64 Flue Sensor Carbon Removal
When the Daikin Kombi boiler triggers the 11 64 error code it often indicates carbon buildup on the flue sensor that alters its resistance characteristics and produces false readings interpreted by the control board as ignition failure. Proper troubleshooting involves safely removing these deposits to ensure accurate readings and efficient operation because even minor soot layers can shift the sensor’s output outside the expected 1-5 kΩ range at operating temperature. This process helps prevent further issues and maintains the boiler’s performance over time by restoring correct exhaust gas monitoring that protects against incomplete combustion.
Carbon buildup on the flue sensor triggers repeated 11 64 codes after electrode changes. Remove the sensor from the flue elbow using a 10 mm spanner. Spray sensor tip with approved cleaner and wipe dry with a lint-free cloth.
Reinstall the sensor and run a combustion check. This step ensures exhaust readings stay within safe limits.
Daikin Kombi 11 64 Error Service Needs
Persistent Daikin Kombi 11 64 errors after electrode replacement and pressure verification point to deeper control or sensor circuit faults that require systematic diagnosis beyond basic component swaps. The boiler’s ignition sequence relies on precise timing between the gas valve opening and flame detection via the ionization probe, so any deviation in the PCB’s monitoring thresholds can lock out the unit even when hardware appears functional. Technicians must therefore examine wiring continuity, transformer output stability, and flue gas analyzer results to identify whether the fault originates in the main board or ancillary sensors. This comprehensive approach minimizes repeat visits by addressing root causes rather than symptoms alone.
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