Solved!!! Thank you all for your time. The misunderstanding was indeed mine...
in the config.g code
M106 P5 S255 H3 T70 ; T2 HE
I was operating under the impression that they were set to Always-On by default by the earlier part of that line of code. A fellow toolchanger user informed me of this behavior and I reviewed the syntax more closely.
https://reprap.org/wiki/G-code#M106:_Fan_On
Tnnn Set thermostatic mode trigger temperature
Hnn:nn:nn... Select heaters monitored when in thermostatic mode1 3
The H3 T70 implied that the fan would be operating at speed S255 anytime the hotend 3 temperature was over 70c.
Crisis averted, thank you very much for all your help and suggestions.