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Not AC related Posted by Ari [Email]  (#2847) [Profile/Gallery]
(more from Ari) on Thu, 16 Aug 2001 09:36:19
In Reply to: high speed fan relay question, jordan, Thu, 16 Aug 2001 09:04:10 Members do not see ads below this line. - Help Keep This Site Online - Signup |
This relay only has to do with the radiator cooling fan if the radiator gets VERY hot. It should never come on under normal driving conditions. It will have no effect on your AC.
In some years Saab had a two-speed fan. The low speed comes on when the radiator temperature hits 90C, OR if the AC high pressure side reaches a certain pressure (indicative of outside temp). The high speed kicks in when radiator temp hits 110C.
Not all cars have the two speed fan - some have just one speed, triggered off the same stuff as the low speed. In those cars, there is no need for the high speed relay, but to keep the relay boxes common, there is a spot for it, just blank.
Look at your radiator fan. The two-speed fan has a resistor on it - a long, thin, gold-colored rectangular metal box. The one-speed doesn't have a resistor. Another way to tell is to look at the radiator thermoswitch - it's threaded into the back of the radiator on the right side (facing forward), about half-way down the radiator near the edge. If the thermoswitch has two wires, it's a one speed system and won't have the high-speed relay. Two-speed thermoswitches have THREE wires.
So this won't have any effect on how good your AC is. Make sure your pollen filter has been replaced recently, and that the area around the condensor (at the base of the windshield) is free of old leaves and debris. As to running low on coolant, most probably that's due to a small leak. You can easily leak a little coolant, and it evaporates before it gets to the ground. A little leak over enough time will drop the level. Look around for telltale signs, like whitish or greenish powder on hoses, especially at the clamp. It may very well just be a slightly loose clamp.
A decent AC shop should be able to tell you if your AC is working properly - all they do is stick a thermometer into a dash vent and measure the air coming out. I can't claim to know the proper specs, but on a warm day, the air coming out should be below 50F. Maybe others can give more info.
Good luck!
posted by 140.157....
, Thu, 16 Aug 2001 09:36:19 <-- Viewing This Message
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