heater problem
 

Hi. I have a 93 Mercedes 300se and I'm having problems with the heater blowing a little hot air through vents. but when press recirculation button it has good flow of air for a few minutes. then switch turn off. no more flow of air any ideals what could be the problem thank you for your help its cold here Houston tx right now.

The easiest and least expensive would be check by replacing your dash HVAC unit to see if any improvement occurs. The more expensive, and likely fix is a replacement of the blower motor voltage regulator and, since you're that far into the repair, also blower motor. It's not a tough job. There's lots of posts about how to do it ( I believe that I've done a post on it 3-4 years ago). While you're at it, I recommend that you also clean and re-lube your mono-wiper external and internal assembly. Let us now how it turned out.


AL