Lexus RX 2004-09 :: Air Conditioner Connection Line Shows Check But Nothing Works


Dec 29, 2015

I have a 2004 rx330 and it's recently been acting up. Sometimes the heat and air won't work, there is a noticeable difference in the way the car drives too.

I hit climate and it shows check air conditioner connection line and nothing works, it's making for very cold drives to and from work.

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Lexus GX 2004-09 :: Check Connection Of Air Conditioner Message But Everything Works On GX470

I recently purchased a used 2004 GX470.

Everything on the Info/Nav Center screen seems to work, at least as far as I know so far, except when I push the "Climate" button, I get the blank screen with the exception of the "Check the connection of the air conditioner" message.

When I got it, the A/C wasn't working, but it was trying. Today I added gas to the system (it was a bit low) and cleaned the cabin air filter (disgustingly dirty, with next to no air movement through it). Now A/C is there! (it is 100+ today!)

To get around the missing climate control screen (and what I assume are controls thereon) I turn on the recirculation button and also the "auto" button, and raise or lower the temperature controls. Heat works when I turn the temp up, A/C tries when I turn it down. But I still get the message on the control screen.

I assume that the control screen for "climate" also includes some widgets for controlling and/or setting options, such as (hopefully) just running the fan without A/C with external air (should I so desire on a cooler day) and stuff like that.

I have seen others fix the similar problems by reconnecting some clips behind the screen, which I can certainly try out, but seems like the other similar problems, when the issue was a wire loom connector behind the screen, that they had other problems, such as the A/C not working.

I THINK all my systems are working, I just can't see the climate control screen. All the other systems (audio, settings, maps (different subject later *L*), etc. all work and seem to display OK, so I don't think it's the screen.

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I have a 2006 GS300. Changed out the battery today, and immediately after the AC quit working. Pushing the climate control button reveals the message "Check the connection of the air conditioner".

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I have a 2003 GX470 with 174,000 miles. It continues to be a great vehicle.

Recently my air conditioning system only blows warm air in both the front and rear. When I start the vehicle, the Navigation screen flashes the message "Check Air Conditioner", then the A/C button on the Climate screen flashes.

I have searched the forums and read every post regarding this issue, and it seems that one possible fix is the "magnetic clutch relay", but the link to Sewel Lexus lists this part as belonging to the ES330, and NOT the GX470. There is NO such part listed for the GX470 on that website.

One other post suggested that the author pull the AC error codes, but I don't know how to do that on the GX470.

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I have tried looking online to no avail except for one site selling ford part that has this line for almost 300 dollars. It is just a plastic line that leads to a metal line. Even the Ford Parts site doesn't carry it! That's insane! I was thinking of cutting the plastic line off where it meets the metal line and using rubber fuel line with hose clamps on the line and the plastic fitting on the tank. I just dont know if this will be good enough.

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