Ac Shut Off After 5 Minutes On 100f High Way Driving

[cupertino]

Hi,

I have a 2003 GX470, AC Shut off after 5 minutes on 100F high way driving. It was about 100 degree last week in SF Bay area.

After 5 minutes high way driving, the ac shuts off. I took it to dealer, they can not duplicate the problem.

I did have the ac relay replaced last year due to the same problem. However, since dealer can not duplicate the problem they will not replace the ac relay because it is still working....

Does anyone has the same problem ? any suggestion ?

Thank you.

[denslexusgx470]

Hi,

I have a 2003 GX470, AC Shut off after 5 minutes on 100F high way driving. It was about 100 degree last week in SF Bay area.

After 5 minutes high way driving, the ac shuts off. I took it to dealer, they can not duplicate the problem.

I did have the ac relay replaced last year due to the same problem. However, since dealer can not duplicate the problem they will not replace the ac relay because it is still working....

Does anyone has the same problem ? any suggestion ?

Thank you.

The a/c really just turns off? Maybe the compressor is just resting? Does the light stay on even though you claim that the a/c system turns off?

[Jim_Chow]

Hi,

I have a 2003 GX470, AC Shut off after 5 minutes on 100F high way driving. It was about 100 degree last week in SF Bay area.

After 5 minutes high way driving, the ac shuts off. I took it to dealer, they can not duplicate the problem.

I did have the ac relay replaced last year due to the same problem. However, since dealer can not duplicate the problem they will not replace the ac relay because it is still working....

Does anyone has the same problem ? any suggestion ?

Thank you.

The a/c really just turns off? Maybe the compressor is just resting? Does the light stay on even though you claim that the a/c system turns off?

By the AC shutting off, do you mean the air turns warm and stays like that? The AC compressor shoudn't just turn off and stay off. My LX's AC has no issues, and it was 113F in Phoenix last weekend. The compressor will go on & off in effort to control the interior temp if in recirc mode, depending on the temp you set. In fresh mode, it pretty much stays on all the time if the outside air is hot. Don't expect the AC to blow icy cold when it's 100F outside. The cooling abilty is related to the air temp. When it's hot outside (over 100F), it might cool to only 80F, but when it's 80F, it might cool to 60F, etc. The old R12 ozone-depleting refrigerant on my '86 Toyota cools better in 100+F temps than the newer R134a (no surprise). On my '86 4Runner, I once had an issue of a defective AC amplifier. The AC would intermittently work, sometimes on (usually when you don't need it), sometimes off. I had the amp replaced (on a little circuit board), which fixed the problem.