Greetings all great early 911 Knowledgebase,

The other day I decided to use the heater in my newly-purchased '73 S coupe, and was thoroughly impressed with the amount and temperature of heat produced by heat exchangers. I was less impressed when I couldn't get the heat to stop and it all but melted my left shoe!

Basically, the entire system works extremely well...I just can't get hot air from seeping out of the vent above the driver's left foot. My first thought, simply based upon my readings, was the flapper just after the heat exchangers...but I'm hoping to hear that it's less complicated than that.

Thanks in advance for any help you can provide.

Tony