1998 GS300 - A/C not working - Club Lexus Forums


1998 GS300 - A/C not working

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Old 06-13-12, 05:02 PM   #1
stebenne
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Default 1998 GS300 - A/C not working

On my way home this evening my A/C stopped blowing cold air and the A/C button on the temperature control panel started blinking. The blower/fan is working fine...just no cold air. No other instrument panel/service engine lights are on and everything seems fine with the engine. Do you think this is electrical...or maybe the A/C system needs recharged? Suggestions?

Really appreciate any feedback. Thanks!

~Steve B.
Highland, IL
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Old 06-13-12, 05:25 PM   #2
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Ok. Do I need to go through a Lexus dealership for this part or ?? About how much $, do you think?

Thanks!
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Old 06-13-12, 05:49 PM   #3
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There are a couple of relays for the A/C system. I'm guessing I probably need the A/C System Relay which runs about $100?

http://www.autozone.com/autozone/par...901592_0_5345_
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Old 06-13-12, 06:18 PM   #4
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Quote:
Originally Posted by stebenne View Post
There are a couple of relays for the A/C system. I'm guessing I probably need the A/C System Relay which runs about $100?

http://www.autozone.com/autozone/par...901592_0_5345_
Yea the a.c. Relay, but is your compressor kicking on or is it locked up?
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Old 06-13-12, 06:24 PM   #5
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Put some gauges on it to see if you have freon? It may just need to be charged up. Also, using the gauges will tell you if the compressor is bad.
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Old 06-13-12, 06:35 PM   #6
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It's kicking on.

??
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Old 06-13-12, 06:37 PM   #7
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It's kicking on.

??
Ok thats good news your compressor is fine, its the magnetic clutch relay located under the hood

Last edited by DosyBoy; 06-13-12 at 08:07 PM.
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Old 06-13-12, 08:10 PM   #8
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Also known as mg/clt in the fuse box, thats your problem.. DONE
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Old 06-17-12, 01:34 PM   #9
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Ok. Update! The mg/clt (magnetic clutch relay) is working fine. We tested it and it does not need to be replaced. My A/C is still not working. This leads me to believe that the AC Compressor Relay needs to be replaced. Can anyone provide the location of the relay on the 1998 Lexus GS300? Is it in the engine somewhere...or behind the dash? I already have the new relay (Four Seasons Part # 36025) but I need the location! Thanks!
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Old 06-17-12, 01:38 PM   #10
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If its the relay, then how is it kicking on? I say just get a cheap $5 can of freon, charge it and see if it gets cold if not, then its only $5 bucks dropped
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Old 06-17-12, 01:41 PM   #11
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Have you tried google yet? I just typed your exact question and got this:

http://www.justanswer.com/lexus/1e45...ed-no-air.html

the "download" links have your answer
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Old 06-17-12, 01:43 PM   #12
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Yeah...but the way the A/C stopped working all of a sudden, as I was driving along the interstate, leads me to believe it's electrical and not a loss of freon. My old Camry lost Freon but it happened gradually.

If anyone knows where the A/C Compressor relay is located, please let me know.

Thanks!
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Old 06-17-12, 01:58 PM   #13
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Yes, I already tried Google and I didn't find the answer to my question in the downloads...still looking for the location of the A/C Compressor Relay.
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Old 06-17-12, 02:16 PM   #14
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I only suggested freon because that was one of your questions.

I found this on google:

http://www.scribd.com/doc/41771244/Lexus-GS300-Manual

The answer IS there, just gotta search through it. I got to page 12, but I'm at work and cant be searching through all the pages. That link has ALL the details of locations of EVERYthing in the A/C system.
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Old 06-17-12, 08:00 PM   #15
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First thing to do is hook it up and get your pressure readings... Knock that out and then go from there... Was it blinking from the AC recirculation light to the outside intake light?
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