iMac 2020 27" Fan On All the Time

iMac 2020 27" Configuration

3.6GHz 10‑core 10th-generation i9

Radeon Pro 5700 with 8GB of GDDR6

40 Gb Ram

512 Gb SSD

I wish to preface this message with this is the second iMac from my original purchase. The first arrived dead on arrival. Thus I returned it and this is now the replacement.

Background: This will be my 6th iMac owned over the past 20 years.

Issue: Within minutes of starting up or waking from sleep, the fan comes on and stays on. This happens whether I do any activity, such as check email, or do nothing. None of the previous iMacs made any fan noise until heavier tasks were attempted, and this was rare. In fact they were dead silent.

The RPM is highly about 1200 rpm all the time.

The fan noise is low level and I have read that Apple considers this an acceptable decibel level. I am unable to measure, nor should I. Apple may consider this acceptable, but as a consumer I do not.

This is not an isolated incident as there are discussion since last year about this exact same subject.

https://discussions.apple.com/thread/251730390?page=6

https://forums.macrumors.com/threads/fan-noise-on-imac-2020.2253629/

https://www.reddit.com/r/mac/comments/iv1jqv/2020_imac_annoying_fan_noise/

However, towards the end of the life of my iMac Intel White iMac (2007), the fan would also come on just after startup or waking from sleep. This went on for a few weeks until the fan got louder and the iMac died.

So, I am extremely concerned about this fan being on a brand new, now the second, expensive iMac. I am also extremely worried that this iMac will quit.

Yes, there is an extended Apple Care warranty. Yet, it took two days of my time to setup and configure.

Attempts to fix: (which I should not be doing at all)

Reset the SMC

Reset the NVRAM

Reduce the brightness of the screen

No second monitor

No significant background process

Location is always cool with no obstructions