At last count there were 255 automobile manufacturers and each one had many different models over the years. I haven't memorized every one just like you haven't memorized every tractor brand and model. No one would expect that of you.
I'm still missing something that should be obvious but something isn't adding up. If I understand correctly, you had no air movement at all meaning the fan was not running, then you logically guessed at the resistor and now you have what is typically level 2 airflow at 3,000 rpm but no air flow at idle. Assuming you're staying on the same speed setting, what is changing besides engine speed and possibly charging system output? As I've been reading it, air flow changes with how far you press the gas pedal.
If I have that right, that brings an entirely different variable into question. Do you have any vacuum controls that run the mode doors? Most vacuum-operated systems are spring-loaded to go to defrost mode if there's a complete loss of vacuum. That's for safety. Your feet might freeze but your windshield will be clear. Could you have low vacuum at idle and a mode door isn't moving properly?
I'm still hung up on why the resistor assembly went bad. Even if you could easily measure the current flow through it, I doubt any of us could offer useful advise because that's not a test we normally would do. Based on the symptoms we just replace parts. You have a weird problem that defies logic and even if you provided current flow numbers, there's little chance we'd know what to do with them.
Sunday, June 24th, 2012 AT 3:25 AM
