Question about 1998 Toyota Camry
The ac green light is on, the ac controls and fan, climate controls, functions normally, but there is no cooling effect. There is also no indication that the ac turns on/off when running the car idle. Usually I could hear outside the car when the ac turned on. (The car has been working perfectly since 1998, 450.000 km).
I am quite technical, m.sc. electronics and software, so I could to a lot of investigations my self. Paying for good advices is no problem for me :-)
There are only two causes for the compressor to not turn on: (assuming is not damaged)
1. there is no cooling gas in the system.
2. the relay is not working.
If there is no gas in the system, you need to chech for any leak wich you are already doing.
But I recommend you to check the relay first, it is located in one of the pipes and it have 2 or 3 cables attached.
Most of the cases when the compressor suddenly stop working is the relay.
And you can find a spare in most autoshops.
Posted on May 31, 2009
If no cool air comes out (even at high engine RPM) then there can be several suspect areas:
1. Refrigerant volume
2. Refrigerant pressure
3. Drive belt
4. Compressor lock sensor
5. Magnetic clutch
7. Pressure switch
9. A/C switch
*2 A/C amplifier
Most possibly it is the Refrigerant volume. So inspect the volume. Observe the sight glass on the liquid tube.
Running engine at 1,500 rpm
Blower speed control switch at ”HI” position
A/C switch ON
Temperature control dial at ”COOL” position
Fully open the doors
*: Bubbles in the sight glass with ambient temperatures higher than usual can be considered normal if cooling is sufficient.
Posted on May 30, 2009
Your first course of action is to take the pressue on the low side of the AC line. The compressor won't cycle on without a minimum amount of refrigerant in the system. This is a safety feature installed on most cars to prevent the compressor from overheating and burning out when there's insufficient refrigerant in the system. The less refrigerant in the system, the harder the compressor has to work. Assuming the pressure is low(most pressue guages will show acceptable pressure by going into the green)
If the pressure is normal and there's no need for refrigerant, the compressor is likely bad and needs replacing. Hope this completely answers your AC problem. Take care and please feel free to post back with any comments or concerns. All the best!
Posted on May 23, 2009
Have you thought of refilling the gas in the ac compressor. the gas level will also contribute to this.
When car is idle the ac cools lesser than when moving. also watch that hint.
Good luck pal.
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Posted on May 24, 2009
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Posted on Jan 02, 2017
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