The air con fan which comes on in parallel with the compressor on my Peugeot
806 has recently become one speed only...maximum! It didn't used to be noticeable but now is on, loud, whenever the digital air con is in 'auto'. It goes off when I switch to 'eco'. Is there a sensor somewhere which controls the fan speed? The compressor clicks in OK and the system seems to be working fine. Any clues anyone? Thanks.