Both error codes signify that there's a problem with the internal sensor. The difference between the code is that F2 signifies that there's a problem with the internal ambient air sensor and F3 signifies that there's a problem with the internal coil sensor.
To fix the problem you'll need to access the sensors and check to see if there's anything wrong with them. To access the sensors you'll need to remove the internal unit front case. Once you're able to get access to the sensors you can do the following:
- Clean both filters as weak air flow can cause an incorrect reading
- Check the sensor plug is firmly connected to the indoor PCB
- Check for any breaks in the sensor wire
- Check the ambient air sensor has strong air flow (the sensor must be placed in front of the coils)
- Check the coil sensor socket is clean. This socket is exposed to condensate water so the socket can corrode over time
Once you've checked everything and the problem is still occurring, replace both sensors.
If you have any further questions or want to buy new sensors, contact us via email at info@airconditioningcentre.com or call us at 0370 3344 556.