Window Defrost Setting
Question:
Thanks all for the help, much appreciated!
– Hide quoted text — Show quoted text ->Are there any visible things that would point to one gas or the other? > Aside from the sticker on the evap case that tells you the quantity > and which "freon" to use, the service ports are different. > Could also be a sticker on the radiator core support. > — > Old Crow > ASE Master Tech Chevy Master Tech > ‘82 FLTC ‘Pearl’ > ‘84 S-10 4×4 350k miles and still going
Response:
Warning label under hood or on the compressor if it’s still there. — John "Anything you say can & will be misquoted & used against you" ‘01 FLHR "Red" ‘99 XC 700 BRC HOG
– Hide quoted text — Show quoted text -> Are there any visible things that would point to one gas or the other?
Response:
>Are there any visible things that would point to one gas or the other?
Aside from the sticker on the evap case that tells you the quantity and which "freon" to use, the service ports are different. Could also be a sticker on the radiator core support. — Old Crow ASE Master Tech Chevy Master Tech ‘82 FLTC ‘Pearl’ ‘84 S-10 4×4 350k miles and still going
Response:
Are there any visible things that would point to one gas or the other?
– Hide quoted text — Show quoted text -> Hi PIC My 94 Yukon came from factory with R134! Maybe 93 was last year > for R12??? Larry > Just wondering if the AC kicks in when the temperature setting is set to > hot > and the window defrost setting is chosen . At idle when the defrost > button > is first pressed, I noticed my truck sorta stumble then idle returns to > normal again, is this the AC clutch being engaged? I know that it does > kick > in when the setting is set to cold, but what about when it’s set to the > hot > setting? > ‘94 GMC > What is the cuttof year of the old AC gas that is now banned?
Response:
Hi PIC My 94 Yukon came from factory with R134! Maybe 93 was last year for R12??? Larry
– Hide quoted text — Show quoted text -> Just wondering if the AC kicks in when the temperature setting is set to hot > and the window defrost setting is chosen . At idle when the defrost button > is first pressed, I noticed my truck sorta stumble then idle returns to > normal again, is this the AC clutch being engaged? I know that it does kick > in when the setting is set to cold, but what about when it’s set to the hot > setting? > ‘94 GMC > What is the cuttof year of the old AC gas that is now banned?
Response:
Just wondering if the AC kicks in when the temperature setting is set to hot and the window defrost setting is chosen . At idle when the defrost button is first pressed, I noticed my truck sorta stumble then idle returns to normal again, is this the AC clutch being engaged? I know that it does kick in when the setting is set to cold, but what about when it’s set to the hot setting? ‘94 GMC What is the cuttof year of the old AC gas that is now banned?
Response:
> Just wondering if the AC kicks in when the temperature setting is set to hot > and the window defrost setting is chosen . At idle when the defrost button > is first pressed, I noticed my truck sorta stumble then idle returns to > normal again, is this the AC clutch being engaged? I know that it does kick > in when the setting is set to cold, but what about when it’s set to the hot > setting? > ‘94 GMC > What is the cuttof year of the old AC gas that is now banned?
Pic, Yep, that’s your A/C clutch kicking in. The compressor will cycle in defrost mode regardless of climate control temperature setting. Hot or cold, she’ll cycle to keep the air nice and dry. I believe 1994 was the last year for R-12. You can still get your system serviced with R-12 at a licensed garage, you just can’t buy it as a consumer without a commercial refrigerant license. I retro-fitted my 88′ Sierra for R-134a a few years back (new accumulator, new seals, new expansion valve and high-pressure cut-off switch, system flush and new compresor oil) and she runs 42* in 90* weather. If you do the conversion right she’ll blow nice and cold with the new R-134a. Doc
