2004 Isuzu Ascender Q&A

2004 Isuzu Ascender Question: AC blower when turned to 1-3 will blow great but on 4 and 5 it blows nothing.

All 5 levels worked until a few months ago. 4 went out and 5 worked ,now 4 and 5 don't work....hear electronic hmmming in background. -
Answer 1
Blower motor regulator -
Comment 1
Thank you! I'll check it out -