# AC light flashing, but AC working fine **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** toyota, camry\ **Created:** [August 27, 2018, 4:27pm UTC](https://community.cartalk.com/t/ac-light-flashing-but-ac-working-fine/123811 "2018-08-27T16:27:43Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![dmerle](https://avatars.discourse-cdn.com/v4/letter/d/90db22/32.png) [@dmerle](https://community.cartalk.com/u/dmerle)\ **Post date:** [August 27, 2018, 4:27pm UTC](https://community.cartalk.com/t/ac-light-flashing-but-ac-working-fine/123811/1 "2018-08-27T16:27:44Z")
2000 Camry (4 cylinder) - the AC light started flashing, but the AC is still blowing cold air. There is a bit of noise (sort of a deep whine) that wasn’t there before it started flashing and I hear the noise even when the AC is off. Any ideas? ---
**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\ **Post date:** [August 27, 2018, 4:33pm UTC](https://community.cartalk.com/t/ac-light-flashing-but-ac-working-fine/123811/2 "2018-08-27T16:33:47Z")
A flashing AC light means that the compressor didn’t rotate at the speed that the climate control module commanded. This is usually caused by a loose/worn serpentine belt. Tester ---
**Author:** ![dmerle](https://avatars.discourse-cdn.com/v4/letter/d/90db22/32.png) [@dmerle](https://community.cartalk.com/u/dmerle)\ **Post date:** [August 27, 2018, 4:48pm UTC](https://community.cartalk.com/t/ac-light-flashing-but-ac-working-fine/123811/3 "2018-08-27T16:48:47Z")
Is there any way to tell if it’s worn? And will it damage anything if I don’t replace it. (I was just at a mechanic and assume, but I’m not sure, that he checked whether the belt was loose.) ---
**Author:** ![ledhed75](https://avatars.discourse-cdn.com/v4/letter/l/f6c823/32.png) [@ledhed75](https://community.cartalk.com/u/ledhed75)\ **Post date:** [August 27, 2018, 4:53pm UTC](https://community.cartalk.com/t/ac-light-flashing-but-ac-working-fine/123811/4 "2018-08-27T16:53:15Z")
A broken serpentine belt won’t do much damage. Unless you want your alternator, power steering, and possibly water pump to keep working. That’s all. Yes, go get the belt checked. ---
**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\ **Post date:** [August 27, 2018, 5:05pm UTC](https://community.cartalk.com/t/ac-light-flashing-but-ac-working-fine/123811/5 "2018-08-27T17:05:34Z")
It can be determined of a serpentine belt is loose. But it can’t be determined if a serpentine belt is worn by looking at it. This video explains this. Tester