A/C not blowing cold air (posted on 1995 maxima forum in error)
My car is equipped with one of those electronic air conditioner/temperature controls. My airconditioner was working fine, blowing cold air but i could tell it was getting low on freon. I added a can and folllowed all instructions - keep car running, turn on air conditioner, (hit "AUTO" and turn temperature down as far as it can go: 18 degrees celsius), i emptied the can, but then it stopped blowing cold air completely. In fact, there does not seem to be any difference when I run the blower ("ECON") and the airconditioner (AUTO). I checked the fuse in the fuse box and its not blown. Please help...
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It is likely the integrated circuitry on the switch control but it would have to be diagnosed with electronic test equipment outside the GM shop but a GM shop could likely give you a better idea and diagnosis. There migth also be a recall or service bulletin so it would not hurt to speak to a GM service advisor or shop foreman.
sounds like your blower motor has stopped working check for power going to the blower system if you have power the blower is probably bad the concern is the lack of a fuse blowing or a breaker not cycling you may have a harness problem sometimes a low grade short will heat up wires then melt them together causing a multisystem failure even though a fuse or breaker didn't blow check you harness
OK, do you have 'zoned' cooling where the passenger side can have a lower or higher temperature depending on a setting on the heating/ventilation/a/c console?
This is the way my Cadillac Deville is, it actually has a knob on the passenger side for the passenger to control temperature.
Good luck on this.
Also, make sure the system is charged up fully with r134a.
you need to change drivers side temp door actuator then disconnect battery for 5 seconds and reconnect after changing the part, turn key on for 60 seconds with touching heater control to allow actuator to program and then it will work.
there is a sun load and ambient temperature sensor that needs to be looked at.
there is a switch system connected so that under full throttle,the a/c is disabled to give more power.there is maybe something wrong with the override.
i would check the a/c relay as in the daytime,when hot it seems to fail.get a can of cold spray,and when the car is hot and not working,spray the relay.the cold spray can be bought at an electronics parts wholesale supplier.the temperature of the spray is -60F and it is great for finding thermal problems.
simply "adding a can"is a good way to end up with non-functional A/C. the typical system has high/low pressure switches that enable/disable the system. you need to be at the correct volume of refrigerant as specified on the sticker under the hood. i recommend using the proper equipment, evacuating, pulling a vacuum, and then refilling the system with the appropriate amount.
Does the car run cold or is the temp. correct. Check the thermostat first. check that the radiator and res. is full. Check the hoses to and from the heater core. If one is hot and one is cold then either the shut-off valve to the heater core is defective or the heater core is plugged.