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Same with my temp controller. The A/C compressor would turn on, the push button would click and things behind the dash would clunk. The only thing that didn't happen, no matter what I did, was the blower working. I confirmed by testing for power at the blower and got none. 12V direct to blower showed it worked flawlessly.
So if you ignition switch is new, while it's possibly bad, I think the low hanging fruit is swapping the temp regulator with a good used part, at least after you check the resistor.
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