E07
Atlantic
Return Temperature Sensor (NTC) Fault
Boiler locks out with E07, often associated with very high temperature readings or rapid cycling.
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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
Open or shorted return NTC, Poor contact between sensor and pipe, Wiring harness damage, Control board sensor circuit fault
How to Fix / Troubleshooting
Safety: Isolate electrical power before inspection.
- Visual inspection: Locate the return NTC on the return pipe to the boiler. Ensure it is properly clipped and in good thermal contact with the pipe (use thermal paste if specified by Atlantic).
- Check for leaks: Any leak near the sensor can cause corrosion and false readings. Repair leaks before replacing sensors.
- Reset and monitor: After reseating the connector, reset the boiler and monitor operation. If E07 returns, the sensor likely needs replacement.
- Professional service: A technician should measure sensor resistance and replace the NTC or PCB as required.
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Repair Difficulty
Medium
3/5
Required Part
Return NTC Temperature Sensor
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