F2
Marey
Outlet Temperature Sensor Fault (Electric Model)
Marey electric tankless heater displays F2; unit may overheat or shut down quickly.
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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
Defective outlet NTC sensor, Loose or corroded connector, Sensor dislodged from water path
How to Fix / Troubleshooting
Safety first: Turn OFF all power at the breaker and close the water supply.
Steps:
- Locate outlet sensor: Remove the cover and find the outlet temperature sensor on the hot water side or attached to the heating chamber.
- Inspect mounting: Ensure the sensor is properly seated in its well or clipped to the outlet pipe so it can accurately sense water temperature.
- Check wiring: Reseat the connector on the control board and inspect for damage.
- Replace if needed: If the sensor is faulty, replace it with the correct Marey outlet NTC sensor.
When to call a technician: If the F2 code persists after sensor replacement, the control board may be misreading the sensor.
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Repair Difficulty
Medium
3/5
Required Part
Outlet Temperature Sensor NTC (Marey electric model)
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