Why is my heater blowing cold air. I have a 2001 mitsubishi eclipse and when it idles, it blows cold air (no matter how long it is running) as soon as I start driving it warms up, but when I come to a stop, its back to cold.
I had the same problem with the heater only working when accellerating. Found the overflow tank pick up tube was kinked. This of course made my coolant level low. So when the cars hot the coolant would push into the overflow, but when the car cooled the kink would prevent it from flowing back to the radiator.
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Al, Heaters blend door actuators are malfunctioning or if your car is equipped the call it a heat shut valve.
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It sounds like the heater matrix leaking,usually the dashboard has to come out to get to it.keep an eye on your engine water level too as its the same water and coolent that runs the a/c.if its leaking into the car then you risk over heating the engine.
There is probably some kind of damper that opens and closes under the dash that allows the air from the blower to be blow across the heater core under the dash. Sometimes these are controlled electronically or by vacuum tubes. Look underneath the dash and look for small vacuum hoses that might be dangling loose or possible little wire cables that might have come off the sides. Possibly check Haynes Manuals (www.haynes.com) to learn how to change a Heater Control Valve.
the heator core has gone out this is a divise that uses hot coolent from the engine to heat the air that blowes tru your vents it is located behind the glove box some times it's tricky to reach look under the hood to find 2 hoses running side by side in to the fire wall on the passenger side to pin point the location
Not sure about the ac/radio issue, although others have posted solutions for models later than yours. The oil leaking issue is more than likely a broken or cracked gasket where the pistons of the engine are located. May want to take it to a certified mechanic to get them replaced. Not a very expensive job on a 4-cylinder car. May also want to check the draining bolt where the oil is changed and the oil filter.