Comfortron AC trouble shooting

[Norman Silverman]

OK, here we go.....

I got the book to troubleshoot the system. INDISPENSABLE to this effort. 

As I do a cursory exam, I see that the AC RECIRC SOLENOID is Cracked (the WHITE one in the engine compartment coming out of the HVAC body with two vacuum hoses on it). I tried to patch it up (cracked all around the base), but it does not look like it will hold. 

PLEASE TELL ME THAT REPLACING THIS PART IS NOT AS DIFFICULT AS I THINK IT IS, But I think it is a bear to do....

Norm

[Norman Silverman]

So after looking at what it will take to replace the Recirc vacuum solenoid, I tried something that I hope will work to seal it up (it is broken about 270 degrees around where the cover attaches to the base): I masked everything off and used "Flex Seal" rubber sealant. We'll see. 

Meanwhile, I think I have narrowed down my problem to the valve body on the control unit on the left of the dash. I may try to remove it and follow the instructions in the book to re-invigorate the operation of the valve. 

The heater/ AC door is not moving (vacuum supplied by control unit, not power servo) so either the vacuum solenoid on the plenum is bad or the control unit is bad-or both. 

Will someone please tell me that the AC/HEATER door Vacuum solenoid is not located where I think it is: Inside the heater/ac plenum???? 

Thanks

Norm

[Norman Silverman]

Since a good deal of work is done under the dash, is it just easier to remove the dash top to be able to access everything more easily?

[Norman Silverman]

Thanks. I'll look for Clovis' writings. At this age I can spend more easily than I can bend, so if I have to be a contortionist to do this repair, I'll look for a pro. I have the book on Comfortron and it is pretty complete and simple to follow.