ray says...........
do you think there is a reason someone could want revenge on you???? someone could have put a kipper in your auxillary air intake........................
if not
the pollen count could be high and it may have blocked your filter
thankyou
ray
If you have aircon it is probably the bacteria that always forms in the system , all it needs is spraying with air con cleaner (local accessory shops sell it) or your local garage will do it. If no air con it might be your heater matrix leaking ,check for loss of water and /or damp carpets under dashboard