Heat Consistancy Issues

[Chambers]

Hi all, lately when I'm commuting I will get heat on and off, sometimes its hot enough that you have to turn it down, and others its blowing ice cold air. I know having a little air in the system can cause these symptoms, but in the manner I am having troubles and when they occur lead me to believe it to be a different problem.

Today, when driving I had the windows down and I turned on the heat, but it was a very dull heat, I could barely feel it compared to the temp of the outside air. Then all the heat sopped and it blew ice cold air, but it wont stay at the same fan speed when it does that, I had it in Hi, and it went to a higher speed, such as when you turn the AC on, it will blow a larger volume of air out. It does the same thing when the heat goes out. I then put the windows up, and the heat came back. ??? I have no idea on why this is, lol. It's quite comical. If I put the windows down, the heat goes away again, lol.

On occasion when I'm driving and I have heat, really good heat, I will go to turn the temp down and as soon as the temp leaves 85 and goes to 84 the heat stops, and the larger volume of air will start pumping out again, with cold air. Then the other occasions it will work just fine, the temp will gradually go down degree by degree.

All of this has lead me to electrical issues, but I don't know where to start, I know the climate control will have to come out and be inspected but I wouldn't know what to do when I get it all apart, such as which resistor needs to be replaced etc... I plan to take the car off the road and take the dash out to re-wire the starter solenoid, so I will be able to inspect the wires for the heater system. Any help on where to start would be great. Thanks.