E07
Dimplex
Flue Gas Temperature Sensor / Overheat Fault
Boiler shows E07; fan runs but burner does not light; sometimes accompanied by flue-related warning icon
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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
Failed Dimplex flue gas NTC sensor, Blocked or partially blocked Dimplex flue system, Incorrect flue installation causing recirculation of flue gases, Faulty Dimplex PCB misreading flue sensor
How to Fix / Troubleshooting
Safety first: Flue gas issues are hazardous. Do not operate the boiler if you suspect flue blockage or smell fumes. Ventilate the area and switch off the boiler.
User checks:
- Inspect flue terminal: From outside, ensure the Dimplex flue terminal is unobstructed. Remove any visible debris around (not inside) the terminal.
- Reset the boiler: After ensuring the terminal is clear, reset the boiler and observe operation. If E07 returns, stop using the boiler.
Professional checks:
- Test and replace the Dimplex flue gas NTC sensor if readings are incorrect.
- Inspect the entire flue route for blockages, incorrect joints, or recirculation issues.
- Verify combustion using a flue gas analyser and adjust or repair as required.
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Repair Difficulty
Professional Required
5/5
Required Part
Dimplex flue gas NTC sensor
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