thank you for your opinion in advance. here is my issue in a nutshell: no matter how much i turn up/down, on the fan speed for either the heater or a/c, the fan speed consistently stays at one speed/level.
I have read a ton of comments on other sites that are similar to yours and I would suggest it may be the final stage resistor. Pretty reasonable part but a little difficult to get to, but they are notorious for going out and they regulate the fan speed.
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