renjaminfrankln
Full Access Member
The temperature dial is cable. The locational damper system is vaccum though so if you get trouble in that regard itll only blow out the defroster
I'm going slim chance on rodent nest, because where it would have to be located to block heat only airflow would be a super wierd rats nest lol. I think a broken damper arm if the description is true.
I would also raise the possibility of the cable looking like it is moving fine, but not making full travel due to a broken mount. That is if he did not pull the control unit out when checking it, and just pulled the glove box.
Most likely either the damper arm itself is broken, or the cable isnt moving it all the way. Its a very simple system... if the heater core hoses are hot then it is extremely unlikely the core itself is so clogged as to effect cooling this much unless there was a much more obvious and severe problem w the cooling system.