Question about 1996 Toyota Camry

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My 96 Camry a/c switch (as well as the defroster)

My 96 Camry a/c switch (as well as the defroster switch) does not engage the compressor clutch. I changed the swithes inside but was not the problem. The a/c switch stays green and does not blink. As far as I know, I do not have an AUTO button for climate control. I jumpered the compressor and the cluch works fine. At the wiring harness plug near the compressor, it appears there is no power at the plug when switch is on. Although the a/c has not work for a long time, recently, it did start working and blew COLD air for a long time. However, once car was turned off, the switch stopped working again. It appears the AC is ok, but must be something electrical going on between the switches and compressor. Also, coolant level looks good in the sight glass. Help...its summer and getting hot.

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  • Eric C. Kohli Oct 19, 2011

    May be a part called an Amplifier I had similar problem this was the cause !!



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May be a part called an Amplifier, The compressor on my 96 toyota Camry was cycling off, there was no refrigerant leak , compressor itself was ok ended up being the Amplifier1

Posted on Oct 19, 2011

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The pressures of the refrigerant must be close or the system pressure sensors will not let the AC cluch pull in. AC is just not wise for DIY without some gauges and knowledge. Sorry.

Posted on Jun 30, 2009


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proceed according and fix it. God bless you
If so, the compressor is working and the A/C system probably contains enough refrigerant to make cold air, so the problem is inside the HVAC unit. Replace the motor that controls the blend air door (this is a difficult job and best left to a professional since it involves tearing apart the HVAC unit -- about an 8 to 10 hour job!).
If the compressor does not engage when you turn on the A/C, see if it will run by jumping the compressor clutch wire directly to the battery (use a fused jumper wire). If the compressor works when you jump it, and the A/C blows cold air, the system contains refrigerant and the fault is likely a bad A/C compressor clutch relay or a bad clutch cycling switch or pressure switch.
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Make sure you have the windshield defroster off , the cars computer turns the AC on to dehumidify the windshield as it blows in order to speed the defrosting of the inside glass.
If you have made sure the defroster is not selected on the climate control center , you may try a few other things to determine where your problem lies...
With the vehicle turned off , key out of the ignition , open the hood and unclip the small white plastic plug off of the compressor ( the electric clutch actuator plug). Start the car and see if the clutch is still engaged ...
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If the clutch disengages when unpluged ,turn the engine off and plug the clutch back in.
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Thank you.

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