Ooh ooh I know 

I've been playing with PWM controllers for the fan. Get one that is rated for more than three amps. I have a three and a ten amp controller. Both work really well, feel that the larger has more headroom if you know what I mean.

More later, after eating.

Alistair

> On Apr 20, 2017, at 7:27 PM, Dan N <dn92610@GMAIL.COM> wrote:
> 
> hi all,
> 
> let's say my front heater blower motor works only on high speed and the
> switch is not defective, then it's the resistor inside the blower housing
> and I don't want to remove the dash to replace it..
> 
> so.. if I remove the switch connector and replace it with a DC 12V variable
> speed resistor like this one
> http://www.ebay.com/itm/12V-24V-Max-20A-PWM-DC-Motor-Stepless-Variable-Speed-Control-Controller-Switch-/111936836128
> 
> my question is .. will it work?
> 
> thanks
> 
> dan