Vent Question
I periodically notice that when I begin driving, a light breeze of warm air is being blown through the vents in the car, even though I haven't adjusted the climate controls (which are set to "fresh air" by default). If I turn on the fan for a few seconds and then turn it off, the warm air ceases.
Does anyone have an explanation of why this happens? It doesn't seem to occur all the time, just once in a while. Thanks. |
Re: Vent Question
Would your circumstances suggest this could be air that has warmed in the vent passages as the car sits in the sun? Even if it's 50 F out, sitting in the sun the air in the vent system will warm up to 80 or so, and without AC it'll only gradually cool down to the outside temperature. Any chance this is what's going on?
cheers -- doug |
Re: Vent Question
Isn't that a feature of any car?
With fresh air mode on, air small amounts of air will pass into the car to prevent stale air buildup. |
Re: Vent Question
Originally Posted by DougD
(Post 145322)
Would your circumstances suggest this could be air that has warmed in the vent passages as the car sits in the sun? Even if it's 50 F out, sitting in the sun the air in the vent system will warm up to 80 or so, and without AC it'll only gradually cool down to the outside temperature. Any chance this is what's going on?
cheers -- doug |
Re: Vent Question
Originally Posted by Sungod18
(Post 145332)
Isn't that a feature of any car?
With fresh air mode on, air small amounts of air will pass into the car to prevent stale air buildup. |
Re: Vent Question
Cabin Heat - on MOST vehicles, is generated by passing the heated engine coolant though the passenger compartment (up under the dash, near your feet, but in the center). This is often called the "heater core." Then a fan blows air through a directed blower area that encompasses the aforementioned heater core. Voila! Hot air in the cabin area.
This method is why the heater blows cold air until the vehicle warms up a little bit, because the coolant is cold too, especially on cold days (which, of course, is when you NEED a heater!). It is this way in the Civic. |
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