What is the purpose of this thing?

[grannyknot]

It sits between the blower and the heater box and the blower fans ground is wired through it.

Thanks,

Chris

[Martzedcars]

Those are the resistors to make 3 speeds out of a one speed ventilator....  and clever thinking the japanese engineer placed it.. in the vent.hose.. it heats the air and cools the resistor and the resistor can be cept fairly smal.. three flies catched at one go!

[grannyknot]

Got it,  the 3 speeds of the blower.

Thanks

[Martzedcars]

Yeap.. fan...vent... blower.. whatever.. ;-)  that thing that blows air.. haha..

But know... if the blowermotor becomes worn out, use it only on full speed..  better restore it before it kicks the bucket..  if you use it on half or low speed the resistor is not cooled enough and will ...eh...kick the bucket!   (This is because the motor is asking more current and the airflow is limited by lower rpm's..)