Anyone know why my aircon won't operate on the slowest fan setting any more? It was recharged at the last service along with a new pollen filter.

Maybe a drop in system pressure has caused this (leak) ? I think I would get it checked out by a specialist air con servicing agent as air con should function at any setting on the fan speed.

Anyone know why my aircon won't operate on the slowest fan setting any more? It was recharged at the last service along with a new pollen filter.

Fan speed controller faulty - I think that this thing will just be a dropper resistor - so the slowest speed is probably used most and drops most voltage.