Heat coming out of defrost won’t stop

[jgurnari]

Heat is pouring out of passenger side defrost vent.

Where can I check to see if a vent / heat diverter may be open and not closing? Would it be the underside rear vent or somewhere at the dash or firewall?

The levers between seats are both in down position and dash levers off.. pushed to far left.
Heat lever right side between seats has tension when pushed up and down and doesn’t “feel is hung- up or loose in any way.

1985 911

[darrin]

search for info about heater boxes -- sounds like your's is stuck closed

[Arne2]

Agree, right side heater box sounds stuck, as well as the right side diverter valve in the trunk.

[jgurnari]

Have Any pictures of the diverter in the trunk? The heat is coming Out from passenger side defrost vent... Not sure where to look to see if it’s open or closed. The heater box is in open position in back so the heat Is not being directed to defrost vent from there. Got to be in the trunk.. but where!?
Thanks