A/C Button Blinking

[brooklyn99corolla]

Need some advice on what to fix! A/C light blinks about once every two weeks, I guess the compressor is no engaging since air comes out warm. All I do is turn of the air and go crazy on the little button, I press it real fast on and off like 10 times and it works again for another two three weeks, do I need a new switch or a new compressor? air comes out iced cold when the button doesn't blink. Thanks for any help!

[BLUEMEANIE]

it means you are starting to run low on refrigerant. (R12 or R134a which ever your car takes)

[msrdude]

Originally Posted by BLUEMEANIE

it means you are starting to run low on refrigerant. (R12 or R134a which ever your car takes)

It should be R134A. R12, i think, is banned and they required everyone to convert their R12 cars to R134A due to the environment problem or something like that.
You can check your refrigerant by buying a cheap 10 dollar gauge meant for checking refrigerant. It has instructions in the package so follow what it says. Also, only touch the L port and not the H port.

[brooklyn99corolla]

whats the difference between the L port and H port? where are these ports located? can i just add R134A if needed or do i have to let all the r12 out and then recharge with R134a?

[msrdude]

Your car takes R134A refrigerant so do not worry about the R12. Those are for old old cars like the 80s. Not exactly sure what the L and H do because i never paid attention in class. But I do know L is what you touch. Not sure where the L and H is located but it should be easy to spot though. It looks like a metal piping with 2 caps one labeled L and one labeled H.

[brooklyn99corolla]

Thanks Dude will try and get some r134a this weekend and try to charge it up! can i overcharge it? or will it just stop when its full?

[msrdude]

No that is why i said to buy the cheap 10 dollar refrigerant checker thing. Over-charging it will cause problems.
O also, i recommend buying the refrigerant with the adapter thing that connects to the L port.

[AlaricD]

Originally Posted by brooklyn99corolla

whats the difference between the L port and H port? where are these ports located?

The L is the "low pressure" side, the H is for the "high pressure" side. Only add refrigerant through the low pressure side (the fitting on the can won't even connect to the H port). Be sure to wear gloves and goggles (refrigerant in the eyes can't be good).

You should get a Chilton or Haynes manual for your car-- it'll pay off in the long run.

[brooklyn99corolla]

Thanks for all the help guys!!

[msrdude]

Welcome to the forums AlaricD.
Ok, i checked out Mitchell on Demand and it says your car holds 1.41 lbs. of refrigerant. That doesn't mean you put 1.41 lbs into the L port. Only put how much the gauge says when you check it. And AlaricD is right, L is low port and H is high port. Now i remember

[dorman68]

Check your ac clutch relay. My buddy's car had the same issue. The local parts guy says he sells a ton of them.

[brooklyn99corolla]

How would i check it and how would i know if its bad? do you have a part#? Thanks

[dorman68]

Toyota has a service bulletin for this issue.



Conversion Calculator 2002 Toyota Corolla LE Sedan L4-1.8L (1ZZ-FE)

Vehicle Level Heating and Air Conditioning Technical Service Bulletins All Technical Service Bulletins A/C - Inoperative/A/C Light Flashing A/C - Inoperative/A/C Light FlashingNotesELECTRICAL
EL011-05
Title:
A/C LIGHT FLASHING - MAGNETIC
CLUTCH RELAY
Models:
'01 - '04 Camry, ECHO, & Celica
'02 - '04 4Runner, Corolla, & MR2 Spyder
'03 - '04 Highlander, Matrix, Sienna, & Solara
June 3, 2005
Introduction
This bulletin is to provide information regarding countermeasures to the A/C magnetic clutch relay for A/C light flashing (inoperative A/C) issues on some vehicles equipped with a magnetic clutch compressor.
Applicable Vehicles
^2001 - 2004 model year Camry, ECHO, and Celica vehicles.
^2002 - 2004 model year 4Runner, Corolla, and MR2 Spyder vehicles.
^2003 - 2004 model year Highlander, Matrix, Sienna, and Solara vehicles.

Parts Information
Inspection Procedure
1.Locate the A/C magnetic clutch relay.
2.Verify the part number printed on the side of the relay.
A.If the part number is 90987-02022, please replace the relay with the countermeasured relay P/N 90987-02028.
B.If the part number does not match 90987-02022, then please diagnose problems by referring to the Technical Information System (TIS): applicable model year and vehicle Repair Manual: Air Conditioning: Troubleshooting.
NOTE :Relays other than P/N 90987-02028 should not be used for this application.

covereddate.





© .

[brooklyn99corolla]

Thanks! my corolla is a 1999 but i'll check for the numbers anyway.

[brooklyn99corolla]

Originally Posted by dorman68

Check your ac clutch relay. My buddy's car had the same issue. The local parts guy says he sells a ton of them.

Thanks Dorman!!! even though my corolla is a 99 it was the AC clutch, you saved me a bunch of $$ i went to a local mechanic and he told me compressor $400+, i went on ebay picked up the relay $8 shipped and everything works!!!! Thanks Again A++++++