lanced726

I have linked a tutorial on how to recharge the AC on a 2009 Lexus IS250

Luc2

I have a 2009 IS250AWD with only 50K miles and I have different problems with the air conditionning

1- The air even placing the temperatures to "LOW" generate only luke warm temperature. The passenger side no cool air. The two sides throw a large amount of air.
2- The low pressure indicate a pressure of 70 psi ( in the red zone). The mechanic took the reading the engine shut off. The output temperatures were 25 C (77 F driver side), and 31C (87F passenger side)
3- The cabin filter has been changed a week ago.

Is anybody can help
Thanks

daddystop

It sounds to me like your blend door servo is freddy fuzzpuckered. It's a common thing on IS300's apparently. Mine did something similar, replacing the servo fixed it.

Luc2

Hi
This afternoon, my car IS250AWD 2009 50K miles was send to a car air conditioning specialist, for 3 hours. He has emptied the system, vacuum the system for an hour and he added compressor oil and he replaced the R132a, he also have used a color dye to find any leaks in the system. After testing the system (pressure :Low; High), and has found that maybe a slow leak comes from the evaporator, while not being completely positive about it. The amount of R132a was very low in the system . After this maintenance the output of cold air is impressive in a day with an outside extremely high temperature & humidity .
I had to set the inside display temperature to 27C (80 F) , for feeling comfortable any temperature under that setting make me feel too cold.
The system was never before inspected. He recommends this procedure being done every 5 years, to get rid of the moisture & re-oiling the compressor. The cost was only 210$(cdn) or 155$ us.

If this fall I feel a decrease in cold air output , they will search again to find the leak.
regards
Luc

daddystop

You shouldn't have to do anything to your AC system if you don't have leaks. Your refrigerant won't degrade over time and stop doing it's job so I would question any shop that suggests you must do this every five years to get rid of moisture in a CLOSED system. When you pull vacuum on the a/c system, you pull all the moisture out. If your system has a leak, this would have been found when vacuum was pulled on the system before it was filled with oil and refrigerant. If your system was found to be leaking because it was tested properly prior to filling, then they should have never filled it with expensive refrigerant.

Just because they have the tools to do the job doesn't mean they're honest or good at doing the job. It sounds like they just made you a recurring paycheck for themselves.

Luc2

Thanks for your comments.
I live near montreal canada where it can takes 15-20 minutes for the engine to get to its normal operating temperature
May I ask if I should start the air conditioning after starting my car in winter to have heat rapidly, instead of waiting for the engine to get at its normal operating temperature ? if yes is this bad for the air conditioning , and will it affect its normal life ?
regards
Luc

daddystop

I'm not quite sure on that one. I live in Texas and it gets over 110* F here in the summer time sometimes..... it is well known that running your A/C when it's that hot outside can cause your car to overheat if it's cooling system isn't working up to par.

If I lived in cold climates, I don't think I'd use the A/C to let the car warm up faster. The car has warmup enrichment maps for that exact purpose. This means that when the car detects that it's coolant temp isn't at operating temp yet, it will inject a richer air fuel mixture because that burns hotter and heats the coolant in the block up faster.

If your vehicle is taking 15-20 minutes to reach operating them, I would suspect a problem w/ the thermostat. It should literally take 2x cycles maybe of the coolant going into the block and then into the radiator before it's completely warm. I, don't know much about living where it gets cold though so maybe someone that's more experienced with that kind of climate can help you better. My instinct is to say that I wouldn't use the a/c when it's already cold outside to help the car warm up faster.