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Discussion Starter #1
Good Morning everyone,

I am having issues with my heat on my 2003 RSX. When the car is fully warmed up and you go to turn on the heat, only cold air will start to blow out. Once the car starts to move cold air will continue to blow out until the car is above 1 RPM's. As you start to drive and are above 2 RPM's the heat will stay warm, but as soon as you come to a stop (like a light or a sign) the car will start to blow out cold air again (AC cold). I was thinking it was the thermostat, but I wanted to hear what else it could be.
 

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Discussion Starter #3
I have tried everything you can think of. A few months back I had to change the blower motor resistor, since it fried on me
 

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I know you said that you've tried everything you can think of, but try re-bleeding your coolant, several times. Just make sure you're doing the following:

Front end is lifted so that the rad fill neck is the highest point in the cooling system
Set the climate control to hot
Run the motor at 3k rpms and let the fans cycle on/off.

It's not always necessary to do this at 3k rpms, but it's faster than idling and will dislodge stubborn bubbles.
 
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