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Strange A/C behaviour
Hello Audi lovers:
Haven't had any problems lately with my 89 100, but I have noticed lately that when the engine is under load ( near zero vacuum ) that the a/c switches from the upper vents to the lower vents, and blows hot air. It seems to be switching to heater mode. As soon as I let up on the gas, it returns to normal operation. The a/c is cold, and blows through the upper vents again. I have checked the recirculation door, and it is working properly. Where do I look next? Thanks, -- Stephen Clark 89 Audi 100 Houston, Texas USA See my Audi in the Registry at www.audiworld.com! |
Re: Strange A/C behaviour
Stephen,
See if the vacuum check valve is leaking - put a mity vac on the vacuum line onto the CC brain and pump it up to see if it is leaking. Cheers! -- Steve Sears 1987 Audi 5kTQ 1980 Audi 5k 1962 and '64 Auto Union DKW Junior deLuxes (SPAM Blocker NOTE: Remove SHOES to reply) "Stephen Clark" <nospam@spamnot.not> wrote in message news:10hfd4c1rt85v7f@corp.supernews.com... > Hello Audi lovers: > > Haven't had any problems lately with my 89 100, but I have noticed lately > that when the engine is under load ( near zero vacuum ) that the a/c > switches from the upper vents to the lower vents, and blows hot air. It > seems to be switching to heater mode. As soon as I let up on the gas, it > returns to normal operation. The a/c is cold, and blows through the upper > vents again. > > I have checked the recirculation door, and it is working properly. Where do > I look next? > > Thanks, > > > -- > Stephen Clark > 89 Audi 100 > Houston, Texas USA > > See my Audi in the Registry at www.audiworld.com! > > > |
Re: Strange A/C behaviour
Stephen,
See if the vacuum check valve is leaking - put a mity vac on the vacuum line onto the CC brain and pump it up to see if it is leaking. Cheers! -- Steve Sears 1987 Audi 5kTQ 1980 Audi 5k 1962 and '64 Auto Union DKW Junior deLuxes (SPAM Blocker NOTE: Remove SHOES to reply) "Stephen Clark" <nospam@spamnot.not> wrote in message news:10hfd4c1rt85v7f@corp.supernews.com... > Hello Audi lovers: > > Haven't had any problems lately with my 89 100, but I have noticed lately > that when the engine is under load ( near zero vacuum ) that the a/c > switches from the upper vents to the lower vents, and blows hot air. It > seems to be switching to heater mode. As soon as I let up on the gas, it > returns to normal operation. The a/c is cold, and blows through the upper > vents again. > > I have checked the recirculation door, and it is working properly. Where do > I look next? > > Thanks, > > > -- > Stephen Clark > 89 Audi 100 > Houston, Texas USA > > See my Audi in the Registry at www.audiworld.com! > > > |
Re: Strange A/C behaviour
Wow! that was a quick reply. Do you sit there just waiting for the
questions? ( just kidding ). And where would one find said CC brain? I don't have a manual... Thanks for your promptness! "Steve Sears" <steve.sears@SHOESsoil-mat.on.ca> wrote in message news:D_ORc.7492$a65.304731@news20.bellglobal.com.. . > Stephen, > See if the vacuum check valve is leaking - put a mity vac on the vacuum line > onto the CC brain and pump it up to see if it is leaking. > Cheers! > > -- > Steve Sears > 1987 Audi 5kTQ > 1980 Audi 5k > 1962 and '64 Auto Union DKW Junior deLuxes > (SPAM Blocker NOTE: Remove SHOES to reply) > "Stephen Clark" <nospam@spamnot.not> wrote in message > news:10hfd4c1rt85v7f@corp.supernews.com... > > Hello Audi lovers: > > > > Haven't had any problems lately with my 89 100, but I have noticed lately > > that when the engine is under load ( near zero vacuum ) that the a/c > > switches from the upper vents to the lower vents, and blows hot air. It > > seems to be switching to heater mode. As soon as I let up on the gas, it > > returns to normal operation. The a/c is cold, and blows through the upper > > vents again. > > > > I have checked the recirculation door, and it is working properly. Where > do > > I look next? > > > > Thanks, > > > > > > -- > > Stephen Clark > > 89 Audi 100 > > Houston, Texas USA > > > > See my Audi in the Registry at www.audiworld.com! > > > > > > > > |
Re: Strange A/C behaviour
Wow! that was a quick reply. Do you sit there just waiting for the
questions? ( just kidding ). And where would one find said CC brain? I don't have a manual... Thanks for your promptness! "Steve Sears" <steve.sears@SHOESsoil-mat.on.ca> wrote in message news:D_ORc.7492$a65.304731@news20.bellglobal.com.. . > Stephen, > See if the vacuum check valve is leaking - put a mity vac on the vacuum line > onto the CC brain and pump it up to see if it is leaking. > Cheers! > > -- > Steve Sears > 1987 Audi 5kTQ > 1980 Audi 5k > 1962 and '64 Auto Union DKW Junior deLuxes > (SPAM Blocker NOTE: Remove SHOES to reply) > "Stephen Clark" <nospam@spamnot.not> wrote in message > news:10hfd4c1rt85v7f@corp.supernews.com... > > Hello Audi lovers: > > > > Haven't had any problems lately with my 89 100, but I have noticed lately > > that when the engine is under load ( near zero vacuum ) that the a/c > > switches from the upper vents to the lower vents, and blows hot air. It > > seems to be switching to heater mode. As soon as I let up on the gas, it > > returns to normal operation. The a/c is cold, and blows through the upper > > vents again. > > > > I have checked the recirculation door, and it is working properly. Where > do > > I look next? > > > > Thanks, > > > > > > -- > > Stephen Clark > > 89 Audi 100 > > Houston, Texas USA > > > > See my Audi in the Registry at www.audiworld.com! > > > > > > > > |
Re: Strange A/C behaviour
Hey, what else is there to do....oh yeah...work.
The "cc brain" in my '87 is located behind the glove box - follow the vacuum lines. You might want to check to see what Scott Mockry has on his new'n'improved site: www.sjmautotechnik.com Cheers! -- Steve Sears 1987 Audi 5kTQ 1980 Audi 5k 1962 and '64 Auto Union DKW Junior deLuxes (SPAM Blocker NOTE: Remove SHOES to reply) "Stephen Clark" <nospam@spamnot.not> wrote in message news:10hfh49s4qsqhc4@corp.supernews.com... > Wow! that was a quick reply. Do you sit there just waiting for the > questions? ( just kidding ). > > And where would one find said CC brain? I don't have a manual... > > Thanks for your promptness! > > > "Steve Sears" <steve.sears@SHOESsoil-mat.on.ca> wrote in message > news:D_ORc.7492$a65.304731@news20.bellglobal.com.. . > > Stephen, > > See if the vacuum check valve is leaking - put a mity vac on the vacuum > line > > onto the CC brain and pump it up to see if it is leaking. > > Cheers! > > > > -- > > Steve Sears > > 1987 Audi 5kTQ > > 1980 Audi 5k > > 1962 and '64 Auto Union DKW Junior deLuxes > > (SPAM Blocker NOTE: Remove SHOES to reply) > > "Stephen Clark" <nospam@spamnot.not> wrote in message > > news:10hfd4c1rt85v7f@corp.supernews.com... > > > Hello Audi lovers: > > > > > > Haven't had any problems lately with my 89 100, but I have noticed > lately > > > that when the engine is under load ( near zero vacuum ) that the a/c > > > switches from the upper vents to the lower vents, and blows hot air. It > > > seems to be switching to heater mode. As soon as I let up on the gas, it > > > returns to normal operation. The a/c is cold, and blows through the > upper > > > vents again. > > > > > > I have checked the recirculation door, and it is working properly. Where > > do > > > I look next? > > > > > > Thanks, > > > > > > > > > -- > > > Stephen Clark > > > 89 Audi 100 > > > Houston, Texas USA > > > > > > See my Audi in the Registry at www.audiworld.com! > > > > > > > > > > > > > > > |
Re: Strange A/C behaviour
Hey, what else is there to do....oh yeah...work.
The "cc brain" in my '87 is located behind the glove box - follow the vacuum lines. You might want to check to see what Scott Mockry has on his new'n'improved site: www.sjmautotechnik.com Cheers! -- Steve Sears 1987 Audi 5kTQ 1980 Audi 5k 1962 and '64 Auto Union DKW Junior deLuxes (SPAM Blocker NOTE: Remove SHOES to reply) "Stephen Clark" <nospam@spamnot.not> wrote in message news:10hfh49s4qsqhc4@corp.supernews.com... > Wow! that was a quick reply. Do you sit there just waiting for the > questions? ( just kidding ). > > And where would one find said CC brain? I don't have a manual... > > Thanks for your promptness! > > > "Steve Sears" <steve.sears@SHOESsoil-mat.on.ca> wrote in message > news:D_ORc.7492$a65.304731@news20.bellglobal.com.. . > > Stephen, > > See if the vacuum check valve is leaking - put a mity vac on the vacuum > line > > onto the CC brain and pump it up to see if it is leaking. > > Cheers! > > > > -- > > Steve Sears > > 1987 Audi 5kTQ > > 1980 Audi 5k > > 1962 and '64 Auto Union DKW Junior deLuxes > > (SPAM Blocker NOTE: Remove SHOES to reply) > > "Stephen Clark" <nospam@spamnot.not> wrote in message > > news:10hfd4c1rt85v7f@corp.supernews.com... > > > Hello Audi lovers: > > > > > > Haven't had any problems lately with my 89 100, but I have noticed > lately > > > that when the engine is under load ( near zero vacuum ) that the a/c > > > switches from the upper vents to the lower vents, and blows hot air. It > > > seems to be switching to heater mode. As soon as I let up on the gas, it > > > returns to normal operation. The a/c is cold, and blows through the > upper > > > vents again. > > > > > > I have checked the recirculation door, and it is working properly. Where > > do > > > I look next? > > > > > > Thanks, > > > > > > > > > -- > > > Stephen Clark > > > 89 Audi 100 > > > Houston, Texas USA > > > > > > See my Audi in the Registry at www.audiworld.com! > > > > > > > > > > > > > > > |
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