A/C light comes on when using defrost
Thread Starter
Instructor
Joined: Aug 2004
Posts: 218
Likes: 0
From: Dallas Texas
A/C light comes on when using defrost
It was an ugly day here in Dallas today..lots of rain..which lead me to using my front winshield defrost for the first time to clear the fog off the window.
When I press the defrost button the A/C button automatically comes on/lights up
I can regulate the temp between warm and cold for the defrost but why does the A/C button light up when I use the defrost button?
Seems weird. Is this right?
When I press the defrost button the A/C button automatically comes on/lights up
I can regulate the temp between warm and cold for the defrost but why does the A/C button light up when I use the defrost button?
Seems weird. Is this right?
Race Director
Joined: Mar 2003
Posts: 11,624
Likes: 18
From: Dover MA
St. Jude Donor '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16-'17-'18-'19
Even if you try to override it when starting out on a cold/damp morning, it will keep going until it decides it's time to shut off. Don't you love machines that are smarter than you are?
Le Mans Master
Joined: Nov 2001
Posts: 6,984
Likes: 0
From: Central Coast CA
Most cars have worked this way for years. As others have already stated, if you use the defroster then you want moisture out of the windshield's air, which is what A/C does. Try it on rainy days, your glass will clear faster with heated A/C on.
Team Owner
Joined: Mar 2001
Posts: 21,325
Likes: 3,841
From: small town in S.E Pa. PA
St. Jude Donor '03-'04
It is designed into the circuit so in the winter, the ac compressor cycles, to allow refrigerant to be circulated keeping the seals lubricated... if this feature was not designed in.. the seals would shrink, and cause premature failure.
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Le Mans Master
Joined: Nov 2001
Posts: 6,984
Likes: 0
From: Central Coast CA
Originally Posted by Evil-Twin
It is designed into the circuit so in the winter, the ac compressor cycles, to allow refrigerant to be circulated keeping the seals lubricated... if this feature was not designed in.. the seals would shrink, and cause premature failure.