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Old 06-23-2009, 04:34 PM   #1
vicvs
 
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My A/C is not working> and summer just started help!!!!

well i recently bough an 08 yaris(2 dr) and starting to love it more and more everyfday........but...... for the last week my a/c has been blowing hot!!! and its like 100 degrees outside!!! i put in a can of r-134 and nothing. any one got any ideas?

thanks guys
im new to this forum too
so rock on
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Old 06-23-2009, 04:37 PM   #2
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did you buy private or dealer?
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Old 06-23-2009, 05:32 PM   #3
vicvs
 
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did you buy private or dealer?



i bought it from a dealer

and i will check the fuses i didnt know how i could miss that
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Old 06-23-2009, 05:32 PM   #4
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Take it back to the dealer and have them inspect it.
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Old 06-23-2009, 05:33 PM   #5
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Also, too much freon can make it stop working as well. If the fuses are fine, and you don't want to go back to the dealership, bleed out all the freon and put back the correct amount.
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Old 06-23-2009, 05:38 PM   #6
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sweet.... good info .... i dunno why i said dealer.
it was an aution
sorry
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Old 06-23-2009, 05:44 PM   #7
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I believe almost all cars have a pressure switch that stops the compressor from running if the freon is low, this is to stop the compressor from burning up upon freon loss/low pressure.
Start the car and have someone toggle the AC on and off, you should see and hear the compressor starting and stopping. During normal use it should alternate off/on as needed to keep the AC cool, but when you first turn it on it should immediatley start. Also, on my Yaris the radiator fans come on as well, yours should too. It could be a simple as finding the pressure switch connection and wriggling or cleaning it, that has happened to me before on several other cars, either that or the switch needs cleaning or replacing, either way this is the first thing to check, especially if it was blowing cold before and then suddenly stopped. If it starting blowing less cool and then eventually stopped that would be more indicative of freon leaking.
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Old 06-23-2009, 05:54 PM   #8
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thanks guys ill try all of these before i pay someone to inspect it
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Old 06-23-2009, 10:14 PM   #9
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Did the AC work initially, and then it recently stopped blowing cold air, or did you discover it blowing hot air the first time you tried the AC?

Does the AC indicator LED light when you press the button?
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Old 06-24-2009, 01:42 PM   #10
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hey... now that im thinking about it ... it did blow a lil cold but not as cold as i wanted so i put more freon... i think i put to much it there.
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Old 06-24-2009, 01:46 PM   #11
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just bite the bullet and have a tech fix it... i don't know about your area, but try to check if there is a training environment in your area... they might be able to fix it for MUCH less than any other shop would... there may even be a toyota t-ten program in your area...


the reason i bring that up is because i am in the t-ten program in my area...
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Old 06-24-2009, 02:11 PM   #12
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Quote:
Originally Posted by vicvs View Post
hey... now that im thinking about it ... it did blow a lil cold but not as cold as i wanted so i put more freon... i think i put to much it there.
That would make sense. The Yaris AC system does have a pressure sensor, which is used to detect high (>455 PSI) or low (<28 PSI) pressure on the high pressure side of the system.

I have a recharge kit that has a gauge on it, which is really the only safe way to recharge one yourself. The recharge kit with the gauge was only about $10 more than one without.

The correct charge for the Yaris (measured on the low pressure side, where you charge it) is 0.15 to 0.25 MPa, which equals 22 to 36 PSI.
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Old 06-24-2009, 02:36 PM   #13
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That would make sense. The Yaris AC system does have a pressure sensor, which is used to detect high (>455 PSI) or low (<28 PSI) pressure on the high pressure side of the system.

I have a recharge kit that has a gauge on it, which is really the only safe way to recharge one yourself. The recharge kit with the gauge was only about $10 more than one without.

The correct charge for the Yaris (measured on the low pressure side, where you charge it) is 0.15 to 0.25 MPa, which equals 22 to 36 PSI.
i would hope that that psi range is when the a/c is operating... not a static pressure...
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Old 06-24-2009, 02:42 PM   #14
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i would hope that that psi range is when the a/c is operating... not a static pressure...
Correct (and good point). Automotive AC is always checked/charged with the engine running, transmission in neutral, and AC on.
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Old 06-24-2009, 02:44 PM   #15
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<------------ currently in the toyota t-ten training program if that makes more sense...
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Old 06-24-2009, 03:10 PM   #16
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<------------ currently in the toyota t-ten training program if that makes more sense...
Cool. Which program are you doing (one year, two year, associates, etc.)?
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Old 06-24-2009, 03:14 PM   #17
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two year... starting brakes/susp next week for summer quarter...
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Old 06-24-2009, 03:18 PM   #18
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if its under warranty WHY would you go and try to add freon to system? hopefully you get a tech who won't realize that you f'd with the a/c.....
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