FAQ |
Members List |
Social Groups |
Calendar |
Search |
Today's Posts |
#1
|
|||
|
|||
Difference between 71 and 72 AC
I also posted this in heating and cooling but I’m not sure that was the correct place to post. For A-body, is 72 factory AC any better with the Thermal Limiter and Super-Heat Shut-Off Switch than the 71 AC that does not have the limiter and super heat switch? What’s the difference and what do those ‘72 parts do? Thanks.
|
#2
|
||||
|
||||
The "heat switch" on the 72 was a huge improvement from a daily driver point of view, basically if you ran out of freon without knowing it (cooler weather especially) the heat switch turns off the compressor. In 71 and older if you ran out of freon the compressor would still operate but without enough freon the oil doesn't circulate so you end up burning out the compressor which in turn spits its guts throughout the system messing up everything.
That being said it doesn't mean much for a typical classic car driver today. Most of us wouldn't drive around with the compressor engaged without noticing that we had no cooling,
__________________
My Break Away Squad 1969 Fbird (Base, 350 & Sprint Cvt’s - 400HO & TA Hardtops) 1969 LeMans (2dr & 4dr Hardtop and a Cvt) 1969 LeMans Safari 2 seat Wagon 1969 GTO (2 Cvt, 2 Hardtops & Judge Hardtop) 1969 Catalina (3 Cvt’s & a 2dr hardtop) 1969 Ventura 2 Seat Wagon 1969 Executive 4dr Sedan 1969 Bonnie Cvt 1969 Bonnie 3 Seat Wagon (2 of them) 1969 Bonnie Brougham (4dr Hardtop & Cvt) 1969 Grand Prix SJ (2 of them) 1969 2+2 2dr Hardtop (Canadian model) |
Reply |
|
|