Chances are that this is a PICNIS situation- Problem In Chair Not In System- make sure you have the button that makes it blow out of both vents... it looks like a little person sitting and has an arrow towards his head and an arrow towards his feet. If the problem still exists then I would consider two things- car is broken, or you're forgetting physics- Hot air rises, cold air falls... maybe the fan system isn't strong enough to force the hot air down to the lower vents along with the top vents... the bottom line is that you shouldn't be doing both... I would just set it so its only trying to blow hot air out of the floor vents- its a much more effecient way to heat the entire car.
The 2004 Honda Civic has 16 valves.
The 2004 Honda Civic has an inline 4 engine.
There is no carburetor on a 2004 Honda Civic. It will be fuel injection.
The 2004 Honda Civic has a 5-speed manual.
The 2004 Honda Civic is a gas-powered vehicle.
The 2004 Honda Civic runs on regular unleaded.
how to replace fuel pump on honda civic 2004
replace air filter on a 2004 Honda civic
The curb weight of the 2004 Honda Civic is 2449 lbs..
The 2004 Honda Civic is 14 ft. 7.4 in. (175.4 in.) long.
The 2004 Honda Civic has single overhead cam (SOHC).
The height of the 2004 Honda Civic is 4 ft. 8.7 in. (56.7 in.).