Browsing Mazmart, and came across this part.

Replacement resistor unit for all Miatas 90-05. This part fails commonly and is typically the reason why the climate control fan does not operate. 30 day warranty.

Has anyone ever had that part fail on them? My climate control fan doesnt work, but if I set it to cold, and open the vents I get cold as I drive with air being forced through the system. Any chance thats my problem?

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could be; I had one fail on my '96, as I recall it was a mild pain in the *** to replace.