Air conditioner fuse and relay location

Tiny
J00KIE2
  • MEMBER
  • 2009 TOYOTA COROLLA
FYI car has 70k miles
When im in my car. When I turn on my A/C it will usually work. Sometimes tho it simply doesn't work at all.

If I listen closely I will hear something click like its trying to work. I will turn it off and back on and will hear the click and nothing comes out of the vents.
Every time this happens (when it doesn't work), it does not last for more than 5 minutes it will eventually turn on, on its own. I cant find much of a pattern to it. Sometimes I will turn it from cold to hot and back, and turn it off and on a bunch of times, and I don't know if this is superstition, but it seems like it sometimes will jump start it and get the air flowing.
This happens w/ both the heater and the A/C.
When does this happen? Sometimes right away (when I get in the car) and sometimes after its been working for awhile it will just poop out for a few minutes. Start working. Poop out. Start working and continue working for the rest of the car ride.
For the most part my A/C and heater it works much more than it doesn't (its not a huge deal but annoying). But this has been going on for more than a year or 2.
Why does everything work for the most part. But this problem comes up every now and then?

Thanks For any help!C
Wednesday, August 12th, 2009 AT 5:23 PM

5 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
This does sound like a bad air conditioner amplifier (there is no relay) here is a guide to help test the fuse with the compressor wiring so you can see how the system works and fuse location in the diagrams below.

and

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Check out the diagrams (Below). Please let us know what you find.
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Wednesday, August 12th, 2009 AT 5:56 PM
Tiny
MRGAFFETT
  • MEMBER
  • 1 POST
  • 2004 TOYOTA COROLLA
  • 140,000 MILES
I noticed the A/C wasn't cold anymore and the little green light on the button was off and it wouldn't turn back on. I troubleshot it and found out it was the little 10amp fuse was blown. I replaced the 10amp fuse under the driver side dash but the fuse only lasted about 12 hours to a day and then it blows. This happened twice with a 10amp and then I tried a 15 amp. Still only lasted a day and then blew.
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Tuesday, October 20th, 2020 AT 12:38 PM (Merged)
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
You don't use a bigger fuse. That's how you destroy expensive components and start fires. You have to find out what is overloading that circuit. This happens when the compressor clutch shorts out which is common here is a guide to help you replace the compressor with a new or rebuilt unit.

https://www.2carpros.com/articles/replace-air-conditioner-compressor

Please run down this guide and report back.
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Tuesday, October 20th, 2020 AT 12:38 PM (Merged)
Tiny
RATZMOHSIN
  • MEMBER
  • 1 POST
  • 1994 TOYOTA COROLLA
  • 200,000 MILES
When I switch on the ac, the blows and when I press the a/c botton, the green light is not working and even its not giving cold air
i think the fuse is blown
so please give the location of air conditioner fuse of right handler car
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Tuesday, October 20th, 2020 AT 12:38 PM (Merged)
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Right or left they should be similar.

See the guide below on using a test light to check fuses, its the best way

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester
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Tuesday, October 20th, 2020 AT 12:38 PM (Merged)

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