E05
Fairland
Ambient Air Temperature Sensor Fault
Display shows E05 and the unit will not start heating.
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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 ambient NTC sensor, Damaged sensor wiring harness, Corroded connector on main control PCB, Sensor dislodged from mounting point on Fairland chassis
How to Fix / Troubleshooting
Safety: Disconnect power before opening any access panels.
Inspection steps:
- Locate the ambient sensor: On most Fairland pool heaters, the ambient air sensor is a small probe or capsule clipped near the air inlet or coil with two wires leading to the control board.
- Check wiring: Look for cuts, rodent damage, or pulled connectors. Reseat the plug on the main PCB.
- Visual sensor check: Ensure the sensor is not dangling inside the cabinet or touching hot components.
Next actions:
- If the wiring looks intact but E05 remains, the ambient NTC sensor is likely defective and should be replaced with a Fairland-compatible part.
- If you are not comfortable opening the cabinet, contact a technician to test resistance values and replace the sensor.
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Repair Difficulty
Medium
3/5
Required Part
Ambient Air Temperature Sensor (NTC)
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