If the resistor failed most likely it was burned out due to a failing blower motor. At some point in time you need to deal with it.

Dennis,
From my phone.
________________________________
From: Dan N<mailto:dn92610@GMAIL.COM>
Sent: �4/�20/�2017 10:27 PM
To: vanagon@GERRY.VANAGON.COM<mailto:vanagon@GERRY.VANAGON.COM>
Subject: variable speed blower fan

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