Climate Control Regulator - 1989 300SE

[geoellis]

Is anyone familiar with the little impeller device that connects to a hose to blow air into the climate control system? This "regulator" is located under the dash to the far right on the passenger side. Mine developed a nasty squeak and I was forced to disable it; however, what I've now found is that the climate control has a hard time holding a steady temperature.

I'm curious to know what the proper name for this device is and the realtive ease for a DIY replacement?

Thanks!