Ideal Logic System IE fault F6

What it means

Fault detected with the outside sensor.

Likely causes

1. Loose wiring connection at boiler or Outside Sensor
2. Loose wiring connection at Terminal Block or PCB
3. Faulty Outside Sensor
4. Faulty PCB
5. Outside sensor fault

Where to start

1. Connect multimeter across Outside Sensor terminal pins and measure resistance at known outdoor temperature
2. Is the wiring securely connected at both the boiler and Outside Sensor? If NO, securely connect the wiring at both the boiler and Outside Sensor.
3. If YES, disconnect the wires to the outside sensor and check the resistance using a suitable multimeter connected across the Outside Sensor's terminal pins.