Ahh...Misting problems - possibly the tip of a very nasty iceberg, certainly a bag of worms.. On vehicles without climate control: The recirc control controls a vacuum pipe which goes via an electric cutoff valve before it operates the flap (by vacuum). Check by starting engine, turn on blower on medium to high. When you turn recirc on or off you will hear quite a load thump from the passenger side and a distinct change in tone of the air when it draws in from the passenger footwell. On vehicles with climate control: Don't think there is a fuse/relay for the electrically operated actuator flap - you can check if the actuator flap is working like this. Turn ignition on but dont start engine. Turn on blower on lowish setting. When you turn on or turn off recirc you will hear a mild thump on the passenger side when the flap moves. At higher blower settings the tone of the air will change as it draws air from the passenger footwell. Default position for recirc flap is outside air as it would be dangerous otherwise (lack of oxygen to occupants) and both systems turn recirc off after 20 mins automatically to stop people passing out. Those with no air conditioning must get used to a life of misting up on rainy days. Why does it mist up? This is due to the poor design of the ventilation system. The problem is the pollen filter is located in a stupid place - in a place right where water from the windsceen drains - this results in a wet filter or at best a filter drawing air in over water. To make matters worse the drain valves in the a/c system can get blocked allowing the system to become filled with water. There are numerous Ford TSBs on this and other related a/c problems, so rule no.1 - if your car is in warranty get it in now and insist it is fixed, otherwise.... check a/c drain valves and discard if necessary - for cars built prior to 04.99 - fit a revised pollen filter frame (which has a plastic water deflector) - this has to be glued to the pollen filter - also fit an additional foam filter fit a revised blower resistor (which boosts the fan speeds) Now the really nasty bit - if your a/c is packing in or has packed up, not only do your misting problems begin..your love affair with your Shalaxy will probably end... Note 1: the a/c switches off automatically below 5 deg C outside temp to prevent icing up of the evaporator. So at this time of the year the a/c is basically useless. (They could have designed it so the heater came before the evaporator but???) To check aircon is working, with somebody listening under the bonnet and the engine running, (provided it is above 5 deg C ambient), when you turn on the aircon (from econ to auto on the climate control) you should hear the a/c compressor clutch clack loudly and the engine revs will probably dip momentarily. If the output of the a/c is weak and/or the a/c is noisy or making uncharacteristicly strange noises - despite what the dealer might tell you, the refrigerant is low and should be topped up. If it isnt working at all, prepare yourself for a long and expensive process before you get it working again properly (i.e.without any leaks). Note that if any part is changed in the a/c system, the dryer *must* be changed and the a/c lubricant replenished. Seat dealers certainly don't seem to know this simple fact. Sad Fact: There are a number of Ford TSBs regarding faulty/poor quality/failing evaporators (thats the bit in the dash that could be under water..and costs an arm and a leg to replace)