Vortex II Vent Fan Reliability Improvement
I recently replaced my Vortex single-speed vent fan with the Vortex II multi-speed reversible fan. While installing the fan, I accidentally dropped the fan on to a soft bed. I was surprised to find ...
Forum Discussion
Blacklane wrote:
I ordered one of those reversible PWM controllers on ebay as well. I thought it would be perfect. I tested it on the bench with my original single-speed Vortex fan and immediately found two shortcomings:
1. it produced an objectionable whine at every fan speed.
2. when in the "off" position, it still drew several milliamps of current. To actually turn it off and prevent battery drain, I would have to add a second switch.
I'm sad to report the same results. I wired it up in the campground yesterday and on anything short of full power, it sings like a bad bearing! Utterly unbearable... Maybe that explains why heng uses resistors rather than a pwm unit?
Suggestions on a quiet one? I can handle wiring the reversing switch I guess.
