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I suspect that it is the operation of a viscous fan hub. Check this by placing your finger on a blade and seeing if you can spin the fan with the engine stopped. It operates when the engine is started and pumps silicone fluid from one side to the other inside the hub and when it has done so the fan slows down in relation to engine speed . Hence the fan noise on starting and then after a short period the fan noise goes away. It will start to operate again when the engine temperature starts to rise when you are stopped at lights or idling for a while to draw air through the radiator to cool the coolant and when you start moving and air is passing through the radiator again it will slow down. If you experience engine overheating while idling have it replaced as it is not pulling enough air through the radiator to do the job
TPMS - TIRE PRESSURE MONITOR WARNING LIGHT NOTE: Tire pressure rises and falls depending on heat caused by vehicle's operation and the outside temperature. If outside temperature is low, the air inside the tire may cool, causing a lower tire inflation pressure. This may cause the low tire pressure warning light to illuminate.
When the tire pressure warning light comes on, immediately check the air pressure of all tires and adjust to the specified pressure. Make sure the warning light goes off. If the warning light stays on or flashes, there is a malfunction in the TPM system. See appropriate manufacturer service information.
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the fresh air door is stripped at the motor, jaguar has a bulletin, about glueing .....works for a while, long term fix replace heater plenum assy...... Or rig the door to stay in a midpoint postion, access below the pollen filter
I had the same problem with my 2001 Malibu and solved it when a lady "T" boned my wife and I and totaled the car. The solution was a replacement used 2005 Malibu. The only problem now is that I can't turn my head and my wife gets panic attacks when we drive...but at least we are nice an cool!
If I understand correctly the A/C light goes on and off. If so, try to gently push the switch to the side(Not in) while the A/C is on. If this keeps the system working, you need a new control assy(Complete control head)
Fog on the windows is caused by moisture in the air condensing on the cold glass. You probably knew that. So the solution to your problem is to reduce the humidity in the car or warm the glass above the dewpoint. Running the AC will help because any moisture in the air will condense on the much colder evaporator coils before it gets to the windows, but as soon as you turn the AC off that moisture goes right back into the air. Fresh air from outside will help if the moisture level in the outside air is lower, which it ussually is in the winter. The only sure solution is to warm the glass.
You may want to check a service manual and see if there is an air filter somewhere in the cabin heat plenum. If so you may want to replace it. Defrosters and side vents should provide plenty of warm air to clear all windows and it sounds like your just not getting enough air flow. If you're not really into getting behind the dash and tinkering with the heater plenum, you might consider a small 12 volt heater like the ones available at auto parts stores, or you could just let the cabin warm up well before driving. There are also glass treatments that you can use to prevent fogging, I used one for years on a motorcycle helmet, These are ussually a wax and or soap base so they have to be cleaned off and reapplied periodically, but they do work well.