Looking here first before I search fleabay. Seeking a 1970 98 COMFORTRON Transducer 7314213 and a Vacuum Relay 7311063. Trying to resurrect the system in my 98 LS. Right now I can only get floor and defog at 1 million degrees but if I disconnect vacuum input to the transducer I get dash and cold outside air. So trying to locate a replacement.

Thanks,
Steve

 

Are you sure the transducer is bad? Applying a variable voltage 0 to 12V DC you should see a corresponding change in vacuum. The several Comfortron systems I had it was usually the amplifier in the control head that was bad, which defaulted to the heat position and high blower speed.
My Comfortrons did not use the vacuum relay but IIRC by applying a vacuum it shoud close an electrical switch. Have you checked that?
Lastly, while the mounting blackets may be different, the basic operation of the transducer is the same for all GM (Cadillac, Chevy, Olds), I think Caddy also used the vacuum relay, but in different configurations.

 

My friend has a bunch of NOS Delco A/C stuff that he acquired back in the early 70’s. If you can get me the Delco part number (15-??) I’ll take a look for you and see if he has what you’re looking for.

 

I was able to cross reference the GM part #’s you listed to Delco. You need 15-7397 & 15-7418. I’ll try to go later today to see if he has these parts.

 

The blower speeds change but the air is always hot. By unhooking the vacuum input to the transducer and plugging it i was able to get dash vents and the outside air door to open allowing the air to cool some. There's no freon in it but that has never happened before. I reattached the vacuum line and unplugged the 12V to the transducer and it had no affect. The air stayed hot and came out of the floor again.

 

Prosconst, thank you.

 

I show I have the 7311063 relay NOS in my stash. $65 plus the ride. Drop me a line if you want it. Regards Pat 618-554-4362

 

Update, I was able to source a vacuum relay but I do still need the transducer. Thanks!

 

he doesn’t have the transducer unfortunately, good luck with your search

 

Thanks you anyway!

 

I have acquired a transducer, thank you,