Update, the user replaced the stock fan with unknown 3rd party fan which fixed the noise issue.
I purchased a new 3891 and the CPU fan is louder than I'd like.  Pretty annoying as it ramps up and down.  Can someone point me to a good replacement fan only.  I don't see a need to replace the heatsink.  Thank.  
Inspiron 3891 i7-10700 Loud Heatsink/CPU Fan