Drive slower
one thing they are used for is, if you have an older home and your doors and windows aren't air tight, they will help you keep the drafts out and keep the house more air tight.
Air flow. They help to keep air moving to your return air grill.
The Jeep Wrangler 2.5 liter engine intake air temperature sensor is located just above the exhaust manifold. The sensor will have to wires coming out of the top of it.
The simple solution is to set your heater to recirculate so no new fresh air comes in. If it is coming in through the doors and such you may need to replace the seals.
An air conditioner DOES lower the inside humidity. Basically when the hot moist air moves over the cooling coils the the air cools and the humidity in the air condenses on the coils and the air coming out will be cooler with a lower relative humidity. So, to answer your question. Keep the AC on and it will lower the humidity inside. Also keep all windows and doors closed and try to seal up any large holes where air can leak.
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The air doors maybe stuck. Or selector switch is not is not operating correctly.
Keep windows and doors firmly closed, look into better insulation for your home as well to keep in coolness, this way the air conditioner can be on less due to not having to replenish coolness as much.
If you want more airflow, remove the top and windows. For even more, you can remove the doors and the windshield, although I have found it too windy to drive comfortably without the windshield.
You have a problem with your air bag system, get your car to the dealer, NOW!!!
Your air conditioning cool air is routed to the various vents by routing doors. A malfunctioning routing door can be stuck and remain closed.
You close the damper when you are not using the fireplace too keep air from coming in and to keep the air from being sucked out. This is most important in the winter. You don't want cold air coming in and your heat sucked out. When you are using the fireplace you have to open the damper to allow the smoke and fumes to escape.