# A/C Troubles

**URL:** <https://community.cartalk.com/t/a-c-troubles/30765>\
**Category:** Maintenance/Repairs\
**Tags:** airconditioning, lexus\
**Created:** [May 21, 2009, 1:36am UTC](https://community.cartalk.com/t/a-c-troubles/30765 "2009-05-21T01:36:47Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Pepsico150](https://avatars.discourse-cdn.com/v4/letter/p/7c8e57/32.png) [@Pepsico150](https://community.cartalk.com/u/Pepsico150)\
**Post date:** [May 21, 2009, 1:36am UTC](https://community.cartalk.com/t/a-c-troubles/30765/1 "2009-05-21T01:36:47Z")

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Hello,  
  
 I have a 2003 Lexus 300. The A/C Button has a green on indicator light. When lit the A/C works fine. Lately the A/C when on started to bloe hot air. I noticed the green indicator light was flashing. I pushed the a/c button on and off a few times and the light became a steady green. The A/C started to blow cold again. Five minutes later the whole process returned again. Now the green light constantly flashes and I cannot get it to stay steady. Thus no cold air. Does anyone know the cause and solution for this problem?

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**Author:** ![americar](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/americar/32/42_2.png) [@americar](https://community.cartalk.com/u/americar)\
**Post date:** [May 21, 2009, 10:34am UTC](https://community.cartalk.com/t/a-c-troubles/30765/2 "2009-05-21T10:34:31Z")

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Could be a defective A/C relay. They have been known to fail on Toyota’s.

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**Author:** ![mcparadise](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mcparadise/32/32_2.png) [@mcparadise](https://community.cartalk.com/u/mcparadise)\
**Post date:** [May 21, 2009, 11:05am UTC](https://community.cartalk.com/t/a-c-troubles/30765/3 "2009-05-21T11:05:27Z")

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The most likely cause is low refrigerant level. Take the car to a shop that specializes in automotive AC systems. They will fix it.