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Hi, My name is***** you changed the a/c amplifier?
The a/c amplifier is very common to cause the a/c to not come on intermittently. It is located behind glove box on a/c unit. You may get one most any parts store or dealer.
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Do you have any more questions for me? If not then accept answer and rate me 5 STARS. Thanks.
The problem with the second hand one is it may show up with same exact problem and you would not know if problem is fixed unless you get lucky.
Let me know if it works for you. If you have no other questions then accept answer and please rate my answers 5 STARS. Thanks.
I do not know if they are you would need to call parts store?
Ok. Let me know if you find a new or a used one to put in.
I am out of ideas at the moment and am opting out to see if there is another expert that can help you out.
When you say the compressor locks up do you mean the belt stops moving and the compressor is squealing? If the a/c is overcharged it can do this. The compressor has an rotation sensor on it and if compressor stops when it should not then the light will blink. You need to get pressures checked to see if high pressure goes above 250 psi. If it does then see if radiator fans are on.
If you notice you told me you replaced the compressor, expansion valve, thermistor, H/L pressure switch and rec/drier. When the compressor was replaced the condenser and evaporator should of been flushed. After you put in the amp like I advised then the compressor tried to come on and locked up since the system was overcharged. Once the correct amount of oil and freon was put in the amp worked the compressor as it should. I think the amp fixed the issue even though you had to do some other re fix on compressor charge. I think I correctly diagnosed the problem for you and should deserve the 5 STAR rating. Thanks.