AHT error gone after removing Boot Camp

Hi,

Recently I ran AHT on my 2011 27" iMac and got this error: 4MOT/4/40000003: HDD- 1229

The error relates to the HDD fan.

I ran the test 5 times and received the same error (last 4 digits change), so I have booked it in to my local AASP to be checked under Applecare.

I was preparing it for collection today and decided to remove my Boot Camp partition. Afterwards, I ran the AHT 3 times and now I'm getting "no problems found".

Is it likely that the Boot Camp partition was causing the error? If so, can I safetly dismiss it?

By the way, I'm an ACSP and I've gone through all the usual diagnostic proceedures.