The heater on the ea81t wagon (which is currently off the road ) works very well. That is, untill you select the upper vents. Then, all that comes out is cold air. The foot and defrost settings push out warm air fine.

 

The fresh air vent works as it should. The cold air coming out of the upper vents does get forced by the heater fan.

 

If its set to half upper and half feet, hot air comes out at the feet and cold air still comes out the upper vents.

 

Any ideas on what would cause this?

I hope the heater system hasn't been taken to with a chainsaw like my other ea81 wagon had!

I don't have any insight, but here's a ...

 

BUMP

There are a series of flaps (or doors) behind the radio box, that are connected to and controlled by your temperature dial and flow direction dial, with rods and cables.

 

If you're lucky, one of those has just fallen off at either the dial end, or whatever it's controlling. The weakest points are commonly a little plastic "tang" (for lack of a better term) that one end of the cable connects to, that weakens over time and breaks off.

 

Best access is from the driver side..there's a link to a heater core replacement "how to" that'll at least show you where to start looking, and what to take apart to look in there. As soon as I find it, I'll post a link.

 

*Edit/Improvement*:

 

Here's the link, many thanks to Mick: http://www.ultimatesubaru.org/80s/mick/mick-usrm/heatercore/heatercore.html

 

Good luck, .

Thanks, i hope its something simple like that - ive taken the heater box out of one of these before and it was NOT fun!

nothing obviously wrong that i can see on the outside.

 

Also, the control is very stiff throughout its movement. Any ideas?