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sprinkles08, ASE Certified Technician
Category: Lexus
Satisfied Customers: 22976
Experience:  ASE Master and Advanced level certified. Factory trained with 15 years dealership experience
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A.c. light blinking and running hot, Replaced coolant a

Customer Question

A.c. light blinking and running hot
JA: Have you checked the coolant? Have you noticed any leaking?
Customer: Replaced coolant a month ago, it may be leaking
JA: What is the model/year of your Lexus?
Customer: 2007 es 350
JA: Are you fixing your ES yourself? What have you tried so far?
Customer: Replaced coolant
JA: Anything else you want the mechanic to know before I connect you?
Customer: Just blinking a.c. light hot air blowing and overheating
Submitted: 1 year ago.
Category: Lexus
Expert:  sprinkles08 replied 1 year ago.

Hello and welcome to JustAnswer!

It's possible that a/c operation is being disabled due to the engine overheating, or both issues ay be happening due to the same cause. If the cooling fan doesn't run then the a/c is going to blow warm at low speeds and when stopped, and it will cause overheating.

Has the coolant level been rechecked?

Customer: replied 1 year ago.
coolant is good. The fan was making a rattling noise recently.
Expert:  sprinkles08 replied 1 year ago.

The fan has most likely failed then. If you start the engine and turn on the a/c does the fan run, or does it run when the engine is overheating?

Customer: replied 1 year ago.
I don't know, but the engine light is on now along with the vsr light. Hope haven't blown a gasket.
Expert:  sprinkles08 replied 1 year ago.

You definitely don't want to drive it in this condition.

You're going to need to determine if the fan is running along with reading fault codes as the first steps.