A/C fresh air

[Mismost]

Ok, this is not my idea, I read it somewhere, wish I could find it again. I take no credit for this, but I would like some of you Guru's with more experience to verify this modification. The mod stops the intrduction of fresh air while in the A/C mode, and gives you 100% fresh OR 100% recirc air.

Remove passenger kick panel, glove box, ashtray, CC unit, and radio.

Looking in from the glove box on the left is the main air door (MAD) with a red vac line, it opens/closes outside air from in front of the windshield. It works when vacuum IS applied. In fact, you can pull and plug the red line and stop pulling in outside air...which makes your cold air colder, try it, it works.

In the right corner is the fresh/recirc door (F/RD) with a green vac line. This door is only open when vacuum is NOT applied...so the two doors are opposite in operation. SO CONNECTING BOTH TO THE SAME SOURCE MAKES ONE OR THE OTHER WORK, depending on what the CCU tells the source to do...vacuum on or off.

Now behind the CCU is a row of vacuum valves.
First on the right is for the MAD, red line
Second on the right is the F/RD, green line....THIS IS THE NEW CONTROLLING VALVE

Cut and splice the red and green vac lines going to the pods together with a TEE vac fitting. Plug the green vac line from the vacuum valve into the Tee. Now pull the electrical plug off the MAD vacuum valve. That's it, you need one TEE fitting and a pair of clippers.

I have not yet made this modification. I spent about three hours playing with the system, watching, and trying to learn how the system works. I think it will work! It is easy enough to do OR undo and cheap too. Me like cheap and cold air.

Any thoughts, observations, dire warnings??

AND AFTER ALL THAT, MY CENTER VENTS STILL DON"T FREAKING WORK!