Heater temp control on 95 EX/LX

Is the rotary cabin temp control mechanical, vacuum, or solid state? Are the air doors - particularly the mixer door - operated by cable, electric motor, or vacuum motor?
Although the engine heats up, zero heat comes out of the heater, and all other air routing doors function properly.
Theory don't mean squat if it don't work.
  Click to see the full signature.

Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file

Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.