If I turn the A/C off before turning off the ignition does that help prolong the life of the A/C?

2003 CHEVROLET TRAILBLAZER

267,000 MILES • 4.2L • 6 CYL • 2WD • AUTOMATIC

ALANLUVS714

MEMBER
2 POSTS

This is question about all cars, including mine listed above. I have good strong A/C, which always blows cold. i usually have on medium-high living in Florida. But, my question is. Is it better for the A/C to last longer. To keep A/C on when I turn off the ignition? Or should I always turn off A/C first, then turn on ignition? Does it make a difference? Or will one way make the A/C last longer without problems?

Sep 17, 2020 at 11:46 PM

ASEMASTER6371

✓Experienced Mechanic
52,796 POSTS

Good morning,

It does not make a difference at all.

No matter what, the relay will energize when the A/C is commanded on whether it is with the key or from the control head.

It will not effect how long you will go with out any issues.

Roy

Sep 18, 2020 at 12:14 AM

ALANLUVS714

MEMBER
2 POSTS

Thank you. I have always wondered if it was better to turn the A/C off first? or just leave it on, and let it turn off automatically, when you turn off ignition. It sounds like it doesn't make a difference? When you want to make the A/C last as long as possible, without any issues! Now I know.

Sep 18, 2020 at 12:27 AM

ASEMASTER6371

✓Experienced Mechanic
52,796 POSTS

You are welcome.

Always glad to help.

Roy

Sep 18, 2020 at 12:38 AM

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