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Car Forum / Driving, Maintenance, Tuning / Maintenance and Repair / June 20061988 Mazda MX6 Air Conditionar
I was having problems with my AC so figured it was my freon. Got more freon and the compressor is working, but only goes on when the fan is at its lowest speed (1). When it is at 1 the selected A/C light goes on, but then as soon as you switch it to 2,3, or 4, the light goes out and the compressor fails to run, only blowing out warm air. I think it is the actual controls on the dash, but I'm not sure and dont want to waste the money for one until i find thats definetly my problem... Thanks > I was having problems with my AC so figured it was my freon. Got more > freon and the compressor is working, but only goes on when the fan is [quoted text clipped - 4 lines] > waste the money for one until i find thats definetly my problem... > Thanks I had a similar problem with my 91 626 and it turned out to be the fan speed resistor. The part was available through NAPA. Larry Your story doesn't make much sense to me. Is the blower working on all speeds? Does the compressor come on at all (even for a short time) on speeds 2, 3, and 4? Does the compressor cycle when it works on speed 1? www.telstar-electronics.com > Your story doesn't make much sense to me. Is the blower working on all > speeds? Does the compressor come on at all (even for a short time) on > speeds 2, 3, and 4? Does the compressor cycle when it works on speed 1? > > www.telstar-electronics.com The compressor only comes on when it is on Speed 1 and the pipes leading out of the compressor do get cold, so everything there is working well, but as soon as you switch the speed to 2 the air starts to blow out and the compressor turns off and then blows out only warm air. There is a light on the panel for the A/C that, when the speed of the fan is at 1, turns on, but as soon as you switch it out of speed 1 it goes off. Very frustrating... OK...Thanks for confirming your first story. My problem is that I don't understand the connection between the blower fan speed switch and the compressor clutch. I'm not aware of any electrical interaction there. Let see what the others have to say... www.telstar-electronics.com > OK...Thanks for confirming your first story. My problem is that I don't > understand the connection between the blower fan speed switch and the > compressor clutch. I'm not aware of any electrical interaction there. > Let see what the others have to say... > > www.telstar-electronics.com Yea I have no ideas either... hopefully the weather stays cool > > Your story doesn't make much sense to me. Is the blower working on all > > speeds? Does the compressor come on at all (even for a short time) on [quoted text clipped - 9 lines] > the fan is at 1, turns on, but as soon as you switch it out of speed 1 > it goes off. Very frustrating... The A/C system on that car has seven relays, several temperature and pressure switches, a stepped resistor, and integrated A/C heater control unit, lots of wiring, and some computer inputs that affect its operation, among other things. The diagnostic procedures cover several pages in the repair manual. The wiring diagram looks like a road map of down town New York city. You will be changing lots of parts on a guess unless you have the manual and a very good understanding of electrical diagnosis. If you must try parts, the stepped resistor pack and the integrated controller are the two most likely parts that could cause the exact symptoms you described. However any number of wiring faults could also produce the same symptoms. Good luck,  SignatureKevin Mouton Automotive Technology Instructor "If women don't find you handsome, they should at least find you handy" Red Green The problem was the Resistor: It was very corrodide and the smallest of the wires were broken, so i just tried twisting them togehter and put it back in, and the AC worked like a charm, I dont know if i should get a new one though, just to be safe. Thanks! >I was having problems with my AC so figured it was my freon. Got more > freon and the compressor is working, but only goes on when the fan is [quoted text clipped - 4 lines] > waste the money for one until i find thats definetly my problem... > Thanks Check the blower motor resistor for corrosion. |
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