Figured I'd post here to see if you guys could help me get on the right track.

Purchased a 1986 190e-16v that the A/C did not work in (knew this buying it). After playing with the climate controls, I'm only getting air through the vents on the top (center and sides). Lastly, I'm not getting heat either.

Two days ago, I needed to have the car inspected anyway, so I had my mechanic throw dye in to see if it is leaking. It was converted to R134.

The compressor would not kick on at all. I replaced the #1 fuse with a 16a one because that is what the diagram says (used to have a blue fuse there).

Now the compressor kicks on but no cold air. Looking in the viewport behind the driver's headlight, I can see bubbles when I turn the system on in the car. Not sure where to go from there other than to see if it is in fact leaking.

I flushed the coolant system yesterday. While running the car, I turned on the heat and fan all the way up. No hot air coming out the side vents or windshield.
I also only pulled ~6 quarts of liquid out of the car (1 gallon container and a two quart container are full of waste). I do believe that both lines to the heater core were hot after running the car.

A little bit at a loss as to where to start from here. Obviously I have three separate issues...1) no heat, 2) no cold air, 3) inability to direct where the air comes from.

Given I can't control the air flow, I figured that was probably the most sensical to start with.

I started to follow this guide (Troubleshooting and Repairing the Mercedes-Benz 190D and 190E Tempmatic ACC Climate Control System. I started with the checking for vacuum leaks section.

I tested the connection coming off the engine that splits on the driver side under the hood and that holds vacuum when I turned on the car. I should probably go test the two connections on the other side of that Y.

Moving to the glove box, I pulled that out, and checked the aspirator blower. That also functions. I then proceeded to test the vacuum on the 4 and 5 port switchovers.

6 and 9 do not hold vacuum. I checked the switchover and they all hold vacuum according to the correct buttons that are needed to be pushed on the climate control.

This morning I still have no heat. I checked the power to the aux pump (connected it to the battery and it functions. Key on but engine not running and it functions. Engine on and it functions.). Went under the cowl and found this gem. Checked vacuum on the actuator and the line. Both held vacuum. I think the line did not with the engine running but I can't remember if it was that or if it was with certain selection(s) on the climate control.



Lastly, I checked vacuum on the stuff coming up the driver's side that splits. They all hold vacuum individually and with the y connected.

What the hell am I looking for with the heat? My understanding is that absent vacuum, that should allow heat to come through. So with that capped off like that, wouldn't it allow heat to flow unless there was something wrong with the valve itself?

If I understand correctly, I'm now going to have to remove the dash to trace this and see if there are broken connections and/or broken A/C vacuum actuators for 6 and 9, correct?

Any suggestions for how to resolves these problems? Am I on the right track?