Question about 2002 Toyota Camry

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AC button blinking

Thank you for your help. I don't know anything about AC. It's my daughter's car and I just need a little information before I take it to the shop. As a single female it's hard to know when you're being cheated. Any information ahead of the game is always appreciated.

Rose

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  • 958 Answers

Hi mercedes,

here is another thread that is almost similar to your problem, i just paste it here with my reply...

posted by Ron0293 on Sep 27, 2008 Report abuse
1985 toyota Camery in hot weather the car AC quits and will not engage the pump. After it cools the pump will come on again. When this happens the AC button in the car blinks. i know this is a vacuum and/or temperature sensor but i don't know which one it is. The manual I have does not say anything about it. Other wise the AC works just fine. Ron Comment by Ron0293, posted on Sep 27, 2008When I first turn it on the AC is working fine, blowing cold air all the time, the clutch pump is in gauged...when the problem occurs the clutch disingauges and then no cold air.. Comment by Ron0293, posted on Sep 27, 2008When I first turn it on the AC is working fine, blowing cold air all the time, the clutch pump is in gauged...when the problem occurs the clutch disingauges and then no cold air.. It is a sensor somewhere telling the pump to turn off. Comment by Ron0293, posted on Sep 28, 2008there is nothing wrong with the whole AC system when the compressor is pumping! no holes, no leaks, no heater problems or fan problems. The compressor keeps cutting out when the temperature starts to climb. I believe the system has a motor vacuum load/temp. sensor that cuts the AC out when the motor temp. rises from extra load. IE: like going up a long hill. I just don';t know where the sensor is located and the clutch wiring from the compressor is impossible to follow, as it is buried in a wire harrness. Comment by Ron0293, posted on Sep 29, 2008 There are two fans located at the rear of the radiator. They don't seem to be running when the AC pump cuts out. There is a sensor switch on the dryer. when the pump is acting up if i disconnect the sensor wiring the fans start running on high. There is also another sensor on the pump and when i disconnect it the fans start running on high. replacing the wiring returns the fans to off.
There is also a sensor, seems to be internal on the pump and when I disconnect it nothing happens. if(typeof LIB_LOADED == 'undefined'){document.write(''); } Add a Comment

Posted on Oct 02, 2008

  • 2 more comments 
  • francis rivero Oct 02, 2008

    hi again mercedes,


    and here are my replies...

    hello ron,

    let me explain.

    your ac is working fine until the ambient temperature rises.

    i
    am thinking two things or maybe one....you said it is a 1985 camry?...i
    am not sure if that year the compressor has this thermal overloads that
    cutoff the compressor coils as the compressor overheats.

    compressor
    overheats because of lack of oil, over worked because of high pressure
    which is normal at high ambient, or mechanical problem with the
    compressor to make it overheat

    this thermal cutoff is located
    sometimes at the top of the compressor or at the rear of the
    compressor. look for a part with two wire in it and the other wire
    connects to the coil of the compressor.

    another theory is that the high pressure switch is being triggered by the high pressure due to high ambient temperature.

    that
    is normal. that is what it is supposed to do. either deplete some gas
    so that it would not trigger the pressure switch or we look for the
    reason why the pressure is getting too high.

    do you have
    auxiliary fan in front of the condenser?..and is it running? or do you
    have two fans at the back of the radiator?...are they both running when
    you turn the ac on?...

    let me know in order to help you further...use the ask me button so that you won't be confused who is answering you.

    tnx 4 using fixya,

    drcool





  • francis rivero Oct 02, 2008

    hello again mercedes,


    another reply for ron....


    hello again ron,

    i dont know if you are answering my questions
    but it would greatly help us communicate if you could address us by
    using our names in giving comments. you do nut know but the set up with
    fixya is that you could only see one solution whereas we as experts
    could see all of the solutions the other experts gave. so there is
    confusion between us whom you are refering your comment to.

    anyway, just to inform you further,

    normal ac operation:

    1 switch ac on, compressor runs, two blower runs at low speed.
    2 if the switch of the dryer is triggered, meaning it detects a high pressure, it would turn both fans at high speed.
    either temporarily ;
    a.) i say temporary untill the pressure goes back to its normal level and turns the blower to its normal speed.

    b.) temporary if the thermostat would cutoff the compressor,( room
    already cold ) then pressure would go down, fans will turn off, and
    wait for the compressor to turn on again. if it turns on, it will run
    again at normal speed since the pressure is still low.

    or
    permanent. as long as the compressor is engaged, the fans will continue
    to run at high speed when the pressure of the dryer does not go down to
    its normal level . why it woud not go down?

    a.) ambient temperature is really high.
    b.) overcharged with refrigerant.
    c.) dirty condenser, clogged with dirt and leaves, anything.
    3. if thermostat is reached, compressor will cut off, fans will caut off too.
    4. if thermostat is triggered, compressor will run again with low blower and repeats its cycle.

    question; how many wires are there in the pressure switch in the dryer?
    how many are there in the compressor?( the one when you pull triggers the fan)

    let me know again, to continue trouble shooting your problem.

    tnx,

    drcool



  • francis rivero Oct 02, 2008

    hello mercedes,

    i hope i was able to help and you would have advance knowledge regarding the blinking ac switch.

    if you have further question, just use the add a comment in this thread...

    tnx 4 using fixya,


    drcool


  • francis rivero Oct 05, 2008

    hi mercedes,

    how did it work so far?...is the ac running again on the car?...

    keep me posted please,

    tnx,

    drcool


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