1995 Saturn SL2 Air Conditioner Charged but Still Blowing Hot Air
I have a 1995 Saturn SL2 and have had troubles with the ac ever since moving down south. I think she hates the hot summers! Anyway, the ac has to be worked once every year, they but dye and charge it but never find anything wrong. One place convinced me the computer needed to be replace but that didn't fix it. Then I find out the computer is not hooked up to the AC in pre-1996 models. On to another guy, they kept the car for two weeks (!) and never got the ac going. Took it across the streeet, they charged it and it lasted until now. I run a 100 mile per day roural mail route and the heat index has been around 105 degrees and I am dying! Had it dye tested and charged the other day, nice for a while, but the next morning nada! I went and got my own dye/charger with a guage and charged it up to 45, but still blowing hot! Can anyone help?
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A mechanic would check the system with a set of pressure gauges. If the compressor is running, the low side would read around 30psi and the high side would be around 250psi. That is how you know if the system is full of freon or not. You may have to get a professional diagnosis to proceed. If you replace the compressor, the accumulator needs to be replaced and a vac pump is used to pull all of the air out before the freon is added.
Could be several things. First, when car is fully warmed up, open hood and feel your two heater hoses coming out of firewall. Make sure your heater control is on hot, both hoses should feel hot. If only one is hot, your heater core inside heater case is either restricting flow (clogged) or an air pocket is restricting flow in your coolant(need to "burp" system-get all the air out of your cooling system) . If heater core is good, and circulating good, then you may have a temp. control door that is inoperative under dash, and not allowing air to move over your heater core. Good luck.
I had this same problem and put a switch inside the car to turn on the relay remotely. But I believe it is the connection at the temperature sensor near the top of the transmission. My wires were stretched at this sensor from the factory. I have not tried to replace it rework it but if you used an ohm meter you could determine if the wires and or sensor have continuity. This is not the same sensor that runs the temperature gauge in the dash.
Yur transmission and your air conditioner are not in common. For your over heating problem check the engine coolant. Make sure the engine is cooled down prior to doing this. You will want to check the coolant levels in both the radiator and the over flow tank. The over flow tank will have marks indicating where the coolant levels should be when the engine is either hot or cold. Alot of engine noises will be heard through the vent ducting because they go to the engine compartment
if the AC is blowing worm air you need to get your AC recharged if you have alredy done that you should get the compressor checked (it sometimes seazes up or the cluch on it will seaze and you will need to replace it
Did it gradually get warmer over the years or just recently. If it just happened then you could have a leak in the system or a compressor that died. Pressure test the system and verify that the compressor is working. You may get lucky and just need a recharge but more than likely you have a leak somewhere in the system.
I also have a 1999 sl2 saturn . I was having about the same problem but mine also did not want to go into reverse somtimes as well . Ichanged my fluid and filter and put in a good trans conditioner and just about all my trouble went away. The trans filter is just like a oil filter it just screws on the outside of the transmission . It is located down under the air filter housing, and the fluid plug is right on the bottom of the trans.