Quote:
Originally Posted by NoD~
The fan will kick on if you have the AC going. AC kicks on if you get defrost going... so you can have that fan kicking on summer/winter due to that as well.
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That will help engine warm up (a bit) because the condenser is rejecting heat into the airflow ahead of the engine radiator.
If you have a PWM controlled fan, what is need is a duty cycle meter. A cheap way of getting that would be an adapted DMM but you could build something to do it.