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The lack of precious cold air could be caused by: A Freon leak caused by a failed o-ring, seal, hose or component. A clogged expansion tube or refrigerant charging hose. Failed compressor or compressor clutch.
Many A/C compressors rely on a computer generated reset of data to perform properly. Check the gauges, while attempting to energize the system to see if the fluids are up to the proper levels. Too much pressure can also be caused by a blockage in the lines and thus leaking from the valves. When filling with Freon, it is important to do a full Vacuum of the system to prevent air locks, and false readings on the gauges.
You've figured out by now the blinking light means the system has a problem. You'll need to find out if the system is low on freon or if a relay or electrical part is failing. The cooling fan could also be failing to come on, which would make the high side pressure exceed the limit and shut down the system.
Without gauges you can refill the unit by running the engine at about 3000 rpm. Turn AC on full speed. Then open the freon can a tad to get rid of any air in the line and connect it to the suction port. Open can full blast, shake it while upright and continue filling until the intake line going to compressor starts getting cold and sweats. Then stop. Air coming out of vents should be around 41 degrees.
Cabin filter if clogged will only impede air flow - not how cold it is. Actually, id the flow is impeded the air coming out will be colder since less is passing over the evaporator. But that could under certain conditions lead to the evaporator freezing up (then use outside air option instead of recirculated) to deal with situation. There- you are now an EXPERT!
When your car air conditioning is blowing hot air, this means that refrigerant cannot absorb the heat coming from your car passenger compartment.
This kind of problem often cause by a refrigerant leak or a clogged condenser.
If you have a steady reduction of cold air from your car air conditioning system, the possibility is that the refrigerant is slowly leaking out of the hose or seal.
Another reason for the gradual reduction of cold air produce by your car air conditioning system is the clogged condenser but this is only a contributing factor.
To solve the problem you are experiencing, you must first check the condenser for dirt, debris or bug that is building up outside the car condenser, this is the part that is like a mini-radiator mounted in front of your car radiator; Try to clean this with a soft brush also, spraying with pressurized water will do. This will improve your car air conditioning problem. However,if the problem persists,it means you have to refill your airconditioner compressor with a refrigerant(freon gas). Good luck!!!
Fan working OK light still on
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