What a coincidence, this is exactly something I worked on yesterday!
What's precisely the problem with yours ? Mine started with blinking recirc light occasionaly and before I found time to look into it, I heard loud clicking from jumping teeth inside of it. I started removing this motor, but couldn't manage to get to the uper screw.Luckily while the motor was loosened, I think I made it jump the clicking tooth, sprayed the pivot with WD-40 and now it works ok, hopefully till I get a proper tool to get to the upper screw.
Anyway, I"ve read somewhere that inside the plastic shield there is simply a popular 12v motor which can be found in many toys and it's easy to find a replacement. Have you tried to look inside? maybe it is just rusted.
Thanks for the info.
The recirc. light will
blink, the climate control system is designed so that in extreme differentials between inside and outside temperatures, the door is closed until temp. is closer to what you've set it to in the cabin. Then the recirc. door will open a little, then close again.... then open a little longer, close again... and so on. This is because it's not a good idea to continually exclude fresh air from outside, and it mixes a little fresh air in to prevent the air becoming stale. Hence the blinking light.
Once the cabin temp. is close to your selected temp., it should remain open (light off). If the CC senses a big difference in temperature, it will start intermittently closing the door again...
Unfortunately for me, the motor itself (inside the gearbox) has burnt out, a small ring in the armature has come loose, shorting against the windings... lots of acrid smoke and sparks.
It looks like any old motor will work, but one needs to consider the RPM of the motor itself, number of teeth on the gear, and of course, the fittings on the contacts (the white plastic end, opposite the gear -- those spade terminals need to fit inside the connectors in the black plastic part).
I've got someone contacting Bosch on the off-chance it's available as a replacement, but not holding my breath...
Just noticed yours is a '94, it might not be the same as the '97 which I have. In mine, the climate control does as I explained above, don't know if earlier models worked the same. Apologies if this contradicts your information.